VectorStar MS4640A Series Microwave Vector Network Analyzers (VNAs) : Front and Rear Panels : Rear Panel Ports and Connectors
 
Rear Panel Ports and Connectors
The MS4640A Series VNA rear panel connectors are shown below in Figure: MS4640A Series VNA Rear Panel Ports and Connectors (1 of 2) which provides identification of each connector and port.
MS4640A Series VNA Rear Panel Ports and Connectors (1 of 2)
All ports and controls are standard and equipped on all models unless otherwise noted.
1. AC Input Module Connector: Contains the AC Power Rocker Switch, the AC Power Internal Fuses (located under the switch), and the IEC C14 Chassis AC Power Socket.
2. System SDD: The internal Solid State Drive.
3. USB 2.0 Type B Port: USB connection when instrument is controlled by a USB controller.
4. USB 2.0 Type A Ports: USB connection ports for computer peripheral devices such as a printer, keyboard, or mouse. Note that there two (2) additional USB 2.0 Type A Ports on the front panel.
5. Keyboard PS/2 Mini-DIN Port and Mouse PS/2 Mini-DIN Port
6. 10/100BaseT Ethernet Port: RJ-45 LAN port.
7. External I/O 25-pin D-Sub Connector (f)
8. Serial (10101) 9-pin D-Sub Connector (f): A standard RS-232C serial port for computer peripherals. Also for instrument control of special purpose peripherals such as AutoCal calibrator modules.
9. XGA/VGA 15-pin D-Sub Connector (f)
10. IEEE 488.2 GPIB (f) Port: GPIB port for GPIB talker/listener.
11. Dedicated GPIB (f) Port: GPIB port for control of peripheral devices such as a Power Meter or External Source.
12. Bias Input Ports: Bias Input Port 2 (on left) and Bias Input Port 1 (on right)
13. Bias Fuses: Bias Fuse Port 2 (on left) and Bias Fuse Port 1 (on right)
14. Ext. ALC BNC (f) – External Automatic Leveling Control.
15. Ext. Trigger BNC (f) – External Trigger.
16. Lock Status BNC (f)
17. Ready for Trigger BNC (f)
18. Trigger Out BNC (f)
19. Ext. Analog Out BNC (f) – External Analog Out.
20. 10 MHz In BNC (f)
21. 10 MHz Out BNC (f)
22. IF Input/Outputs: a1 IF Input/Output (on left), b1 IF Input/Output (on left center), a2 IF Input/Output (on right center), and b21 IF Input/Output (on right)
23. Analog Inputs: Analog In 1 (on left) and Analog In 2 (on right)
24. Access Loops: Optional.
• Only equipped with MS4640A VNAs with Option 051, 061, or 062.
• If equipped, the < 2.5 GHz Access Loops are (from left to right): a2 Access Loop, b2 Access Loop, Port 2 Src Access Loop, a1 Access Loop, b1 Access Loop, and Port 1 Src Access Loop.
25. Fan Grill
26. Internal Air Cooling Opening
27. Service warning
28. Anritsu Company Instrument Serial Number and Installed Options Sticker.
Rear Panel Port and Connector Descriptions
A summary of the VectorStar VNA rear panel connectors is available in Table: VectorStar MS4640A Series VNA Rear Panel Connectors (1 of 10) below. The table defines each connector’s name, its connector type and general specifications. The External I/O Connector also provides a connector pin-out diagram.
VectorStar MS4640A Series VNA Rear Panel Connectors (1 of 10)
Connector Name
Primary Function / Cross References

AC Power Connectors and Controls
AC Power Input Module
Contains the AC Power Rocker Switch, the AC Power Internal Fuses (under the switch) and the IEC C14 Chassis AC Power Socket, described in rows below.
AC Power Rocker Switch
Power On
Used to the turn the VNA on and off where “|” is ON and “O” is OFF.
Standby to Operate Mode
Once turned on, the VNA is in standby mode. On the front panel, press and hold the left side Standby/Operate key for at least one (1) second to place the VNA in operate mode.
Operate to Standby Mode
With the VNA in operate mode, press and hold the
Standby/Operate key for at least one second to return the VNA to standby mode.
Power Off
Only turn off the VNA when it is in standby mode. Do not disconnect the AC power while the VNA is in operate mode. Do not turn off the VNA while it is in operate mode.
AC Power Internal Fuses
Use the tab in the AC Power Rocker Switch (described above) to remove the fuse cover and access the fuses.
Two (2) T‑Type 6.3 A 250 Volt internal fuses
Rated for 700 VA max.
90-264 VAC, 47-63 Hz (power factor controlled)
IEC C14 Chassis AC Power Socket
Allows for a cable connection to AC mains power using the IEC C13 AC Line Socket on the provided power cord. The other end of the provided power cord provides a plug suitable for the instrument location.

USB Control Port
USB Control Port
USB 2.0 Type B Port
controlling the instrument externally and for remote operation.

XGA/VGA and Serial (10101) Ports
XGA/VGA Video Port
15-pin Mini D-Sub (f) Connector
For simultaneously projecting the instrument’s screen display onto an external VGA monitor, with minimum resolution of 1024 x 768.
Serial (10101) Port
9-pin Mini D-Sub (f) Connector
Compatible with RS-232C. Provides control for AutoCal modules and other accessories.

External Analog Out Ports
External (Ext) Analog Out
BNC (f) Connector
External Analog Output. For external attenuator control, external switch control, analog triggering assistance, measurement system integration and other purposes.
Normal operating modes: Sawtooth sync sweep, TTL indication of driving port, open loop level controller.
Range: -10 V to +10 V; low impedance drive.
Accuracy: 20 mV + 2%.
External (Ext) Automatic Level Control (ALC)
BNC (f) Connector
External Automatic Level Control.

IF Input/Output Loop Connectors
Input/Outputs a1 IF
SMA (f) Connectors
Inputs used with external converters such as Millimeter Wave (mmW) modules, or for antenna testing.
Outputs used with external IF digitizers and processors.
Nominal Inputs: 5 to 20 MHz (mode dependant), 0 dBm for full scale Nominal.
Outputs: 0.2 to 100 MHz (mode dependant), +10 dBm max.
These ports also used to interface with the VectorStar ME7828x Broadband/Millimeter Wave Systems.
Input/Outputs b1 IF
SMA (f) Connectors
As above.
Input/Outputs a2 IF
SMA (f) Connectors
As above.
Input/Outputs b2 IF
SMA (f) Connectors
As above.

10 MHZ Input/Output Ports
10 MHz Input
BNC (f) Connector
Auto-sensing, better than 0.001 Hz/Hz accuracy recommended.
Signal: –10 dBm to +3 dBm, Nominal 50 Ohms.
10 MHz Output
BNC (f) Connector
Derived from the internal reference time base, unless an external 10 MHz reference input is applied.
0 ± 5 dBm sinusoidal, 50 Ohms

External I/O and GPIB Ports
s
External I/O Port
25-pin D-Sub (f) connector.
User-defined I/O for custom external test set interface, to synchronize with different sweep states, such as Start, Stop, or Driven Port. The next section provides a pin out diagram of the connector.

External I/O Port Connector Pin Out
Pin Number
Pin Name – Description
1
Limit Pass/Fail – Indicates the results of limit testing for all channels. User selectable from the Limit Line setup menu.
(0 V to 3.3 V) TTL-high = Fail or TTL-low = Fail.
2, 3, 15, 16
TTL In – Configurable as a digital input for use in sending information to the instrument from external sensors or input devices. The inputs are TTL compatible and 5 V tolerant.
4, 13, 14, 21
GND – Digital signaling ground.
5 - 12, 17-20, 22
TTL Out – Configurable as a digital output for use in sending information to external devices, handlers, and output processors. The outputs are 0 V low and +3.3 V high and are TTL compatible.
23 - 25
Reserved – Reserved for controlling Anritsu external test sets.
IEEE 488.2 GPIB Port
24-Pin (f) GPIB Connector
GPIB talker/listener port
IEEE 488.2 compatible, for controlling the instrument externally, for remote operation.
Dedicated GPIB Port
24-Pin (f) GPIB Connector.
Dedicated GPIB controller port
For the control of external instruments such as power meters, external test sets, or other GPIB compatible accessories.

External Trigger and Lock Ports
Ext Trigger
BNC (f) Connector
External Trigger
Lock Status
BNC (f) Connector
Trigger Lock Status
Ready for Trigger
BNC (f) Connector
Trigger Out
BNC (f) Connector

Analog In Ports
 
Analog Input 1
BNC (f) Connector
Independent input for measurements simultaneous with the RF measurements, for current sensing, efficiency computation, and power detection.
Range: –10 V to +10 V with automatic offset and gain calibrations.
Accuracy: 2 mV + 2% for |V| < 5 V; 2% for |V| > 5 V
Nominal input impedance: 60 K Ohms.
Analog Input 2
BNC (f) Connector
As above.
System Hard Disk Drive (HDD)
‘
System SSD/HDD
The system removable Soid State Drive (or Hard Disk Drive on older VNAs). If spare drives are available, the SSD/HDD can be quickly exchanged for security or other reasons.

Network, USB, and PS2 Connectors
LAN Ethernet Port
10/100BaseT Ethernet RJ-45 Connector.
Standard.
Universal Series Bus (USB) 2.0 Type A Ports
USB 2.0 Type A Ports, two (2) on Rear Panel.
For peripherals such as keyboard, mouse, memory stick, and hardware key.
There are two additional USB 2.0 Type A Ports located on the front panel.
Keyboard/Mouse PS/2 Ports
Dedicated Mini-DIN PS/2 ports, two (2) on Rear Panel.
Used to connect a PS/2 keyboard and/or a PS/2 mouse.
With a user-supplied PS/2 to USB adapter, can be used to connect a USB keyboard and USB mouse, sparing the USB 2.0 ports for additional peripherals.

Bias Input Ports
Bias Input Port 1 Connector
BNC (f) Connector.
One input per Bias Input Port
Optional. Equipped with Option 051, 061, or 062.
Bias Input Port 2 Connector
BNC (f) Connector.
As above.

Bias Fuses
Bias Fuse Port 1
Fuse Connector
Included with optional Bias Input Ports above.
One fuse per Bias Input Port
Fuses are F‑Type rated at 0.5 A, 250 V.
Bias Fuse Port 2
Fuse Connector
As above.

Access Loops (< 2.5 GHz)
a2 Access Loop
SMA (f) port with SMA (m) loop.
Receiver path for Port 2
For <2.5 GHz frequency coverage.
Damage Input Level: +20 dBm max., 0 VDC max.
b2 Access Loop
SMA (f) port with SMA (m) loop.
Test receiver path for Port 2. Specifications as above.
Also used to connect with the VectorStar MN469xB 4-Port (Multi-Port) Test Sets.
Port 2 Src Loop
SMA (f) port with SMA (m) loop.
Port 2 Source path. Specifications as above.
Also used to connect with the VectorStar MN469xB 4-Port (Multi-Port) Test Sets.
a1 Access Loop
SMA (f) port with SMA (m) loop.
Receiver path for Port 1. Specifications as above.
b1 Access Loop
SMA (f) port with SMA (m) loop.
Test receiver path for Port 1. Specifications as above.
Also used to connect with the VectorStar MN469xB 4-Port (Multi-Port) Test Sets.
Port 1 Src Loop
SMA (f) port with SMA (m) loop.
Port 1 Source path. Specifications as above.
Also used to connect with the VectorStar MN469xB 4-Port (Multi-Port) Test Sets.