Bird Technologies 3140 Display - Manual (Page 14)

Bird Electronics Corporation
4
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.
1
6 9
5
Pin 4 -
Power Supply
Ground
Figure 2
DB-9
Connector