TB 9-6625-2280-35
Press any UNITS key (nS or S or mS key).
l.
CALIBRATOR 1 GHz output.
8. Calibrator Frequency Accuracy Test
a. Performance Check
(1) Press MENU key and then press F3 key.
(2) Press F1 key when CALIBRATION/ZEROING menu appears and then
immediately press number 7 key.
CAUTION
Do not press any UNITS key (nS or S or mS key). If any
UNITS keys are pressed, CALIBRATOR 1 GHZ output power
will increase to 100 mW.
(3) Connect TI CALIBRATOR 1 GHz output through a 10 dB attenuator (fixed) to
frequency counter C input.
(4) Set frequency counter for FREQ C function. Frequency counter will indicate
between 950 MHz and 1.05 GHz.
(5) Disconnect TI from frequency counter.
(6) Press CLEAR key three times.
b. Adjustments. No adjustments can be made.
a. Performance Check
(1) Set power meter power pushbutton to OFF position.
(2) Disconnect thermistor mount from power meter interconnect cable.
(3) Connect multimeter (resistance mode) between VRF terminal on power meter
(rear panel) and pin 1 of thermistor mount end of power meter interconnect cable.
(4) Round off multimeter indication to 2 decimal places and record this value as
power meter internal bridge resistance R (value will be approximately 200 Ω).
(5) Connect thermistor mount to power meter interconnect cable.
(6) Set power meter power pushbutton to ON position.
(7) Press CW key only if CW key is not lit.
NOTE
Allow equipment and thermistor mount to warm-up for 30
minutes before proceeding to (8) below.
(8) Set power meter RANGE switch to COURSE ZERO and adjust front panel
COURSE ZERO control for a zero meter indication.
