TB 9-6625-2137-24
] pushbutton. TI will indicate less than or
(12) Press TI TERMINATION [124
equal to -36 dBmO.
(13) Repeat (11) and (12) above at 10 MHz.
(14) Reverse connectors on 124
input. TI will indicate less than or equal to -36 dBmO.
b
(15) Remove 124
balance test adapter from equipment setup and replace with 135
alance test adapter.
(16) Remove adapters No. 2 from equipment setup and connect cables No. 1 to
adapters No. 1.
(17) Connect adapters No. 1 to 135 input of TI and repeat (2) through (6) above
at 10 kHz.
NOTE
If indications between inputs are out of tolerance, replace one
or both cables No. 1 and repeat (11) through (13) above.
] pushbutton. TI will indicate less than or
(18) Press TI TERMINATION [135
equal to -36 dBmO.
(19) Repeat (2) through (6) and (18) above at 1 MHz.
(20) Repeat (14) above for 135
input.
b. Adjustments. No adjustments can be made.
12. Amplitude
NOTE
i
If TI is meeting its amplitude accuracy specification for the 75
nput, it is reasonably certain that the other inputs (124 ,
135 , 150 , 600 ) will meet their specifications as well.
Hence, further testing will not be required.
a. Performance Check
(1) Connect calibrator OUTPUT to multimeter INPUT terminals. Set multimeter
for ac voltage measurements and set calibrator for a 0.273861V, 1 kHz output. Record
multimeter indication (to be used in (15) below).
50 pF
(2) Disconnect multimeter and connect calibrator OUTPUT to TI 10
input terminal. Press TI ENTRY [RECALL] [0] (pause until reset is completed) [FREQ]
[2] [0] [kHz] pushbuttons; then press BANDWIDTH [20 Hz] pushbutton.
(3) Set calibrator output frequency to 20 kHz and voltage as listed in table 4. TI
will indicate within the specified limits.
(4) Remove ac divider from equipment setup. Set calibrator for a 0 dBm, 20 kHz output.
(5) Press TI MEASUREMENT/ENTRY [OFFSET] pushbutton to off and allow TI
to take several readings until an internal CAL cycle is completed.