This port is present only on MS203xB instrument models. A TTL signal that is applied to the External Trigger In female BNC input connector causes a single sweep to occur. Maximum input is ± 5 VDC. In the Spectrum Analyzer mode, it is used in zero span, and triggering occurs on the rising edge of the signal. After the sweep is complete, the resultant trace is displayed until the next trigger signal arrives (refer to item 2 in Figure: MS2035B Test Panel Connectors).

To prevent damage to your instrument, do not use pliers or a wrench to tighten the BNC connector. Do not over tighten the connector.

This port is present only on MS203xB instrument models. The BNC female connector (refer to item 1 in Figure: MS2035B Test Panel Connectors) is used for connection of an external frequency reference. Maximum input is ± 5 VDC. Press the External Reference submenu key under the System menu and then the Application Options menu to set the reference to external (10 MHz). The amplitude of the External Reference should be between – 10 dBm and + 10 dBm.

To prevent damage to your instrument, do not use pliers or a wrench to tighten the BNC connector. Do not over tighten the connector.

This port is present only on MS203xB instrument models (see item 3 in Figure: MS2035B Test Panel Connectors). It provides the input 50 ohm interface for the Spectrum Analyzer function. Maximum input is + 30 dBm at ± 50 VDC.

To prevent damage to your instrument, do not use pliers or a plain wrench to tighten the Type‑N connector. Do not overly tighten the connector. The recommended torque is 12 lbf · in to 15 lbf · in (1.36 N · m to 1.70 N · m).

The GPS antenna connection on the VNA Master is type SMA‑female (refer to item 5 in Figure: MS2035B Test Panel Connectors). The GPS function is described in GPS (Option 31) .

To prevent damage to your instrument, do not use pliers or a plain wrench to tighten the SMA connector. Do not overly tighten the connector. The recommended torque is 8 lbf · in (0.9 N · m or 90 N · cm).

This Type‑N connector (see item 10 in Figure: MS2035B Test Panel Connectors) provides the input/output 50 ohm interface for reflection measurements of the Vector Network Analyzer at Port 1. Maximum input is + 23 dBm at ± 50 VDC.

To prevent damage to your instrument, do not use pliers or a plain wrench to tighten the Type‑N connector. Do not overtighten the connector. The recommended torque is 12 lbf · in to 15 lbf · in (1.36 N · m to 1.70 N · m).

This Type‑N connector (see item 11 in Figure: MS2035B Test Panel Connectors) provides the input 50 ohm interface for transmission measurements of the Vector Network Analyzer at Port 2. Maximum input is + 23 dBm at ± 50 VDC. Bias Tee output is also available from this port (with Option 10).

To prevent damage to your instrument, do not use pliers or a plain wrench to tighten the Type‑N connector. Do not over tighten the connector. The recommended torque is 12 lbf · in to 15 lbf · in (1.36 N · m to 1.70 N · m).