Manual Zero - Agilent Technologies 85025A User's And Service Manual

he repeat autozero function softkey (
the autozero. You must use a GPIB interfaced sweeper to take advantage of this
function because the analyzer must be able to switch OFF the RF output of the
sweeper to perform the autozeroing.

Manual Zero

Manual zero, represented by the
meter.
1. Remove the RF signal from the detector's RF input.
2. On the analyzer, press
Refer to \Operation," in the
Analyzer Operating Manual
Analyzer Operating Manual
softkeys.
In the DC mode, the 85025A/B/D/E is speci ed for absolute power level
accuracy. In regard to these speci cations, the following conditions apply:
he equipment has had a 30 minute warmup period.
he detector zeroing procedure has been performed.
he o set has been adjusted with a calibrated 0 dBm, 50 MHz signal applied.
race averaging is enabled on the analyzer at low power levels, as required.
he source harmonics are below
he source SWR is 1.0.
o increase the accuracy of absolute power level measurements, select
to properly set the system response to a 0 dBm signal. After
DET OFF ET
zeroing the detector, follow these steps to set the detector o set:
1. On the analyzer, press
port). Press . his ensures the 0 dB o set.
0 dB
5 5
2. Connect the detector to the POWER REF output of a calibrated power meter,
such as an Agilent 436A or 438A. Switch the POWER REF output ON.
3. Press
AUTO CALE
CURSOR
5
4. Press
MORE DET OFF ET
CAL
5
3-4 Operat on
REPT AZ ON/OFF
softkey, is similar to zeroing a power
MANUAL
to perform the zeroing.
MANUAL
Agilent Technologies 8757C/E Scalar Network
Agilent Technologies 8757D Scalar Network
or
for detailed information on these and other
0
40 dBc.
DET OFF ET DET A
CAL
5
.
.
) periodically repeats
(or the appropriate input
Ag lent 85025A/B/D/E