Remote Spectrum Monitor™ MS27201A User Guide : Instrument Overview : Settings Menu
 
Settings Menu
The system settings menu provides access to all instrument system-level settings such as network, GPS/GNSS, date and time, and display.
Settings Menu  
-
DISPLAY
Opens the Display Settings.
ETHERNET
GPS
SCREENSHOT
Opens the Screenshot Setup.
DATE TIME
PORT SETUP
Opens Port Setup.
OPTIONS
Opens the Options Settings.
ADVANCED
RESET
Opens the Reset Settings.
Display Settings
The DISPLAY settings allow you to set the display to a Default or Light color scheme, the latter of which may be more suitable for viewing in bright ambient conditions.
Display Settings
Network Settings
The MS27201A uses Ethernet to communicate remotely with a controller. Most instrument functions (except power on/off) can be controlled via a network connection to a PC connected directly (with an Ethernet cross‑over cable) or through a network. The instrument software supports the TCP/IP raw socket network protocol.
Ethernet networking uses a bus or star topology in which all of the interfacing devices are connected to a central cable called the bus, or are connected to a hub. Ethernet uses Carrier Sense Multiple Access/Collision Detection (CSMA/CD) access method to handle simultaneous transmissions over the bus. This standard enables network devices to detect simultaneous data channel usage, called a collision, and provides for a contention protocol. When a network device detects a collision, the CSMA/CD standard dictates that the data is retransmitted after waiting a random amount of time. If a second collision is detected, the data is again retransmitted after waiting twice as long. This is known as exponential back off.
The TCP/IP setup requires the following:
IP Address: Every computer and electronic device in a TCP/IP network requires an IP address. An IPv4 address has four numbers (each between 0 and 255) separated by periods. For example: 128.111.122.42 is a valid IP address.
Subnet Mask: The subnet mask distinguishes the portion of the IP address that is the network ID from the portion that is the station ID. The subnet mask 255.255.0.0, when applied to the IP address given above, would identify the network ID as 128.111 and the station ID as 122.42. All stations in the same local area network should have the same network ID, but different station IDs.
Default Gateway: A TCP/IP network can have a gateway to communicate beyond the LAN identified by the network ID. A gateway is a computer or electronic device that is connected to two different networks and can move TCP/IP data from one network to the other. A single LAN that is not connected to another LAN requires a default gateway setting of 0.0.0.0. If you have a gateway, then the default gateway would be set to the appropriate value of your gateway.
Ethernet Address: An Ethernet address, or Media Access Control (MAC) address, is a unique 48‑bit value that identifies a network interface card to the rest of the network. Every network card has a unique Ethernet address permanently stored in its memory.
Remote programming and operation between the instrument and remote program is accomplished via a TCP/IP raw socket connection to port 9001. The remote program must establish a TCP/IP raw socket connection at port 9001 to the MS27201A.
The remote program may connect to the instrument IP address or to its HOSTNAME (Ethernet only). If using DHCP instead of a static IP, using the HOSTNAME may be more reliable for finding an instrument on a network.
You may need to contact your network administrator to ensure network security policies, anti-virus, and firewall settings do not block access to the controlling computer and its ports.
The MS27201A can be configured for Dynamic Host Configuration Protocol (DHCP), an Internet protocol that automates the process of setting IP addresses for devices that use TCP/IP, and is the most common method of configuring a device for network use.
To determine if a network is set up for DHCP, connect the instrument to the network and select DHCP protocol. Power cycle the instrument. If the network is set up for DHCP, the assigned IP address should be displayed in the network settings.
Ethernet Connection
Interface between the instrument and other devices on the network is via a category five (CAT‑5) interface cable connected to a network. This cable uses four twisted pairs of insulated copper wires terminated into an RJ45 connector. CAT‑5 cabling is capable of supporting frequencies up to 100 MHz and data transfer speeds up to 1 Gbps, which accommodates 1000Base‑T, 100Base‑T, and 10Base‑T networks. CAT‑5 cables are based on the EIA/TIA 568 Commercial Building Telecommunications Wiring Standard developed by the Electronics Industries Association. A pinout diagram is shown in Table: 8‑pin Ethernet RJ45 Connector Pinout Diagram.
8‑pin Ethernet RJ45 Connector Pinout Diagram
Pin
Name
Description
Wire Color
1
TX+ or BI_DA+
Transmit or bidirectional data
White/Green
2
TX– or BI_DA-
Transmit or bidirectional data
Green
3
RX+ or BI_DB+
Receive or bidirectional data
White/Orange
4
BI_DC+
Not used (common mode termination) or bidirectional
Blue
5
BI_DC-
Not used (common mode termination) or bidirectional
White/Blue
6
RX– or BI_DB-
Receive or bidirectional data
Orange
7
BI_DD+
Not used (common mode termination) or bidirectional
White/Brown
8
BI_DD-
Not used (common mode termination) or bidirectional
Brown
Integrated into the RJ45 connector are two LEDs that illuminate as follows:
LED 1 Off: 10 Mbit/s LAN connection
LED 1 Orange: 100 Mbit/s LAN connection
LED 1 Green: 1000 Mbit/s LAN connection
LED 2 Amber/Yellow: On or blinking indicates LAN traffic
The instrument IP address and its HOSTNAME are set via the System menu (upper left corner) and accessing the ETHERNET settings menu.
TCP/IP connectivity requires setting up the parameters described at the beginning of this section. The following is a brief overview of how to set up a general LAN connection on the MS27201A.
Note 
You may need to consult your network documentation or network administrator for assistance in configuring your network setup.
Ethernet Settings
Refer to Network Settings for general network setup and information.
1. Access the System menu (3-line icon in the upper left corner).
2. Click SETTINGS to access the instrument settings menu, then select ETHERNET to view the current network settings (IP address, HOSTNAME, etc.).
Ethernet Settings
The instrument IP address can be set automatically using DHCP or manually by entering the desired IP address, gateway address, and subnet mask.
Note 
If an active Ethernet cable is connected to the instrument while it is turned on, a reboot may be required to establish a DHCP connection. If the port becomes inactive, verify that an active Ethernet cable is attached to the instrument, then cycle the instrument power off and on.
GPS/GNSS Settings (Option 31)
The MS27201A RSM is available with a built-in global positioning receiver feature (Option 31) that can provide latitude, longitude, altitude, and UTC timing information. This option also enhances frequency reference oscillator accuracy. When the global positioning receiver is actively locked to satellites, this information is saved with all saved measurements.
Note 
The MS27201A RSM Data Sheet provides a list of the options and measurements that require GPS (Option 31). In addition to having Option 31 installed, a GPS antenna is required. Refer to the instrument Technical Data Sheet for compatible GPS antennas.
The MS27201A supports the following global positioning satellite systems:
GPS: The United States Global Positioning System (GPS). GPS is currently the world's most utilized satellite navigation system.
GNSS: Global Navigation Satellite System, a term used worldwide. This term includes GPS, GLONASS, and Galileo. Accessing multiple satellites provides increased accuracy, redundancy, and availability at all times.
Activating the GPS Feature
Attach the GPS antenna to the GPS connector in the front of the instrument.
1. Access the System menu (3-line icon in the upper left corner).
2. Click SETTINGS to access the instrument settings menu, then select GPS to open the GPS settings and info window.
GPS Settings
3. Activate the GPS by sliding the GPS/GNSS toggle switch to on.
4. Set ANTENNA VOLTAGE to 3.3 or 5.0 V.
5. When the GPS receiver has established a “good fix”, the GPS icon is displayed with a center dot and the following information is kept updated:
Fix status
Tracked satellites
Latitude
Longitude
Altitude
UTC timing information
6. Toggling SHOW IN TITLE BAR shows the GPS coordinates in the title bar at the top of the display.
After GPS location fix is attained, the internal reference oscillator begins to correct its frequency to match the GPS standard. After the internal frequency is adjusted to match the GPS standard, the status is indicated by “GPS High Accuracy” showing in the Status menu, which is displayed on the left side of the measurement display. When the GPS feature is not enabled, the reference source displays either “Internal Standard Accuracy” or a user‑selected external reference frequency in the Status menu.
Within three minutes of satellite acquisition, the reference oscillator will have an accuracy of better than 25 PPB (parts per billion). The OCXO internal standard accuracy is ± 0.3 PPM. The correction factor applied to the internal OCXO allows the instrument to maintain GPS frequency accuracy for three days at better than 50 PPB, even when the instrument is obstructed from receiving signals from the GPS satellites.
In order to acquire data from the GPS satellites, you must have line‑of‑sight to the satellites, or the antenna must be placed outside with no obstructions.
If no GPS is connected for at least three days, the Frequency Reference annotation reads Int Std Accy.
Screenshot Setup
1. Access the System menu (3-line icon in the upper left corner).
2. Click SETTINGS to access the instrument settings menu, then select SCREENSHOT to open the screenshot setup menu.
Screenshot Setup
Screenshot setup lets you configure the following:
Capture region: entire window or graph area only
Color: standard or printer-friendly
Annotations: may be placed at top (header) or bottom (footer) of captured image
File Naming: automatic time stamp or manual time stamp
Directory: directory path to destination folder where the file is to be saved
Note 
Screenshots can be previewed on the instrument display from Files.
Date Time Settings
1. Access the System menu (3-line icon in the upper left corner).
2. Click SETTINGS to access the instrument settings menu, then select DATE TIME to display the current date and time settings.
Date Time Settings
The Date Time setup lets you set the current date and time and the time zone.
Date and Time: Manually set or automatically synchronized. When synchronized (Sync Status: Synced), the system uses the network time; if the instrument also has a GPS location fix, the system will determine and use the more accurate of the two, between network and GPS time. Select Manually set to activate the MANUAL DATE TIME window. Here you can scroll to a selectable year, month, day, hour, and minute.
Time Zone: Lists the selectable time zones.
Port Setup
The Port Setup menu allows you to configure the external ports.
Bias Voltage
Bias Voltage setup provides controls to set the voltage level and to monitor the precise voltage and current, and trip state.
1. Access the System menu (3-line icon in the upper left corner).
2. Click SETTINGS to access the instrument settings menu, then select PORT SETUP to display the top panel bias voltage output settings.
Bias Voltage Port Settings
3. Manually set the voltage in the range of 0 V to 34 V.
4. Toggle the bias voltage on or off.
Reference and Trigger
The reference and trigger setup provides controls to set the functionality of the configurable top panel reference and trigger ports.
1. Access the System menu (3-line icon in the upper left corner).
2. Click SETTINGS to access the instrument settings menu, then select PORT SETUP > REF / TRIG to display the top panel reference and trigger port settings.
Reference/Trigger Port Settings
Note 
PORT 0 is always a reference in port.
3. To set PORT 1 as a reference output, toggle 10 MHz REFERENCE OUT on. Otherwise, PORT 1 can be selected as a trigger input or trigger output by using the drop-down selection.
4. Use the drop-down selections to select PORT 2 as a trigger input or trigger output.
Options Settings
1. Access the System menu (3-line icon in the upper left corner).
2. Click SETTINGS to access the instrument settings menu.
3. Select OPTIONS to display the lists of currently installed software options on the left pane and those that are available for installation on the right pane.
Options Settings
Some options can be installed using only a software file. Others may require additional hardware. Contact your local sales or service representative for information on installing new options.
Advanced Settings
1. Access the System menu (3-line icon in the upper left corner).
2. Click SETTINGS to access the instrument settings menu.
3. Select ADVANCED to display the RF Safe Mode. Toggle the ENABLE option to enable the RF SAFE MODE.
Advanced Settings
Reset Settings
1. Access the System menu (3-line icon in the upper left corner).
2. Click SETTINGS to access the instrument settings menu.
3. Select RESET to open the Reset menu.
Reset Settings
The following reset options are available:
SETTINGS RESET
FACTORY RESET: Restores the instrument to the factory default settings for all measurement modes and system settings, including the language, display and audio settings. Ethernet settings and user saved files are not affected. The instrument will automatically restart.
FILE RESET
DELETE USER FILES: Deletes all user files from the instrument’s internal memory, including measurement, setup, and screenshot files. System files are not affected.
DELETE SYSTEM FILES: Deletes all user system files from the instrument’s internal memory, including keyboard EZ names, cable and antenna lists, and log files. Other user files are not affected.
RESET ALL
RESET ALL: Performs a Factory Reset as described above and deletes all user files and system files from the instrument’s internal memory. The instrument will automatically restart.