Technical data

Adjustments 3
N1911A/1912A P-Series Power Meters Service Guide 39
Power Reference Level Adjustment
Equipment
• As per the test equipment list for the power reference level
performance test
Test Method
1 Set: Coarse = 834, Fine = 550
2 Measure power ref. level as per the performance test:
a If the result is > 1 mW, the increment COARSE by 1
b If the result is < 1 mW, the decrement COARSE by 1
3 Repeat step 2 until the result crosses the 1 mW boundary (in either
direction)
4 Measure power ref. level as per the performance test:
a If the result is > 1 mW, then decrement FINE by 1
b If the result is < 1 mW, then increment FINE by 1
5 Repeat step 4 until the result crosses the 1 mW boundary (in either
direction)
6 The adjustment is completed
NOTE
• This adjustment can be performed manually via the commands:
SERV:CAL:ADJ:COUR <Value>
SERV:CAL:ADJ:COUR?
SERV:CAL:ADJ:FINE <Value>
SERV:CAL:ADJ:FIINE?
(Refer to the programming guide for further details on the use of these commands)
• COARSE and FINE values are valid in the range of 0 to 1023
• If adjustment is not possible, then a fault may be present in the DUT (see Chapter 5,
“Troubleshooting Guide”).