TB 9-6625-2137-24
10. Return Loss
a. Performance Check
(1) Connect equipment as shown in figure 2.
Figure 2. Return loss equipment setup.
] pushbuttons.
(2) Press TI ENTRY [RECALL] [0] and TERMINATION [75
(3) Set synthesizer/level generator for 1 MHz and amplitude for 0.0 dBm.
(4) Position true RMS voltmeter controls as listed in (a) through (d) below:
FUNCTION switches out.
(a)
RANGE switches out.
(b)
DISPLAY switches out.
(c)
dBm REFERENCE control to 75.
(d)
(5) Press true rms voltmeter DISPLAY dB/VOLTS pushbutton for dB, and press
dBm/ REL pushbutton for a 0.00 dB indication.
(6) Connect cable No. 1 from directional bridge LOAD jack to TI TERMINATION
input jack.
75
(7) True rms voltmeter will indicate at least -30 dB down.
input jack.
(8) Disconnect cable No. 1 from TI TERMINATION 75
(9) Set synthesizer/level generator for 10 MHz.
(10) Press TI ENTRY [FREQ] [1] [0] [MHz-dB] pushbuttons for 10 MHz.
(11) Press true rms voltmeter DISPLAY REL/dBm pushbutton for a 0.00 dB
indication and repeat (6) through (8) above.
NOTE
Steps (12) through (21) below do not apply for model 3586C.
(12) Replace directional bridge with return loss bridge in equipment setup.