ACCEPTANCE TESTING
7-10
Alternative attenuator functional test (not required for instruments with
Option 1)
(1) Connect the test equipment as shown in Fig. 7-1.
(2) Perform AUTO ZERO and AUTO CAL on the power meter.
(3) On the UUT set:
[CARR FREQ] 10 [MHz]
[RF LEVEL] 13 [dB]*
*For units fitted with Option 3, high power option, select 7 [dB]
[MENU] 70 [ENTER]
The UUT enters the Latch Access diagnostic menu.
(4) Use the [÷10 ×] and [×10 Ø] keys to select RF Board Shift-Reg 1.
(5) Press [NEXT] and [NEXT] again to select Data (bin) :
(6) Use the [÷10 ×] and [×10 Ø] to move the cursor left and right.
(7) Set a reference on the power meter such that 0 dB is indicated.
(8) On the UUT, move the cursor to the MSB and press 0 (0
1111111)
This enables the first 33 dB pad.
(9) Record the relative level measured on the power meter in Table 7-13.
No
te that this is a nominal value as no software correction figures are applied to the
attenuator when performing this test.
(10) On the UUT, press 1 to disable the first 33 dB pad.
(11) Repeat (6) to (10) for the next four MSBs; the 22 dB, 33 dB, 11 dB and 33 dB pads
respectively.
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