Owner's manual

Bird Electronics Corporation

Installing the TPM

The TPM has two RF connectors (Source and Load) that connect to the

transmission line, three test port connectors that are type N female

connectors (Forward, Reflected, and Test), and one nine-pin subminia

ture communication connector (DB-9 Male).

1. Do the following:

• Connect the RF connector labeled Source to the transmitter

side of the transmission line.

• Connect the RF connector labeled Load to the antenna or load

side of the transmission line.

• Use an appropriate coupling kit to secure the TPM in place.

2. Connect the DB-9 connector to a single channel on Model 3140A

power meter panel, or to an alternate appropriate power supply

and voltmeters that will indicate the forward and reflected power.

 Note: The chart below Figure 2 identifies the signals on

each pin of the DB-9 connector.

 Note: Above 4VDC, the accuracy spec does not apply.

CAUTION

Pin 4 must be connected to power supply ground,

other grounds can be left open if desired.

Pin Description

1 Forward Voltage Output, 0 to 5 VDC, 1.0 kohm impedance

2 Ground

3 Reflected Voltage Output, 0 to 5 VDC, 1.0 kohm impedance

4 Power Supply Ground

5 DC Power Input, +11 to +18 VDC, <0.1 A current draw

6 Ground

7 Ground

8 Ground

9 Zero Calibration. DO NOT ground this pin. Leave this pin floating.

Pin 4 -

Power Supply

Ground

Figure 2

DB-9

Connector