14
Subject to change without notice
The frequency indicated on the frequency counter should be
29.300000 MHz, a deviation of ±150 Hz is permissible. Choose
a gate time of 2 seconds or greater for exact results. Note the
frequency value on a sheet of paper, it is needed for the next
step.
Now reconnect the SMB plug [CiC2] to the RFC board. Then
unplug the SMB plug from the IFA-Board, and connect it via
an adaptor[M6] and a coaxial cable [M8] to the “A” input of the
frequency counter, as shown in measurement setup II (using
option “C” connection of the HM5014-2).
The frequency indicated on the frequency counter should be
10.700000 MHz, a deviation of ±200 Hz is permissible. Choose
a gate time of 2 seconds or greater for exact results.
Now take the reading obtained earlier and add the new fre-
quency to the old value. The sum may not differ from 40.000000
MHz more than ±50 Hz.
2.2.6 Check of Amplitude adjustment
In order to check the amplitude adjustment, set the HM5014-2
to the following using measurement setup 1:
RB 1 MHz
Center 500 MHz
Span Zero Span
Ref.-Level -20 dBm
ATT 10 dB
Scale 10 dB/Div
Marker active
(Max Hold, Average, Video fi lter and Tracking Generator not
activated)
The synthesizer is set to the following:
Frequency 500 MHz
Amplitude -20 dBm
Output On
Modulation Off
Sweep Off
Now check that the level displayed is not more than 1 dB diffe-
rent than the level shown on the synthesizer when varying the
level from –20 dBm to –60 dBm. Errors can occur in absolute
position or in scaling.
While performing this measurement, do not vary the ATT set-
ting.
2.2.7 Check of RBW fi lters
In order to check the bandwidth and form factor of the 3 reso-
lution fi lters, use measurement setup 1 and set the HM5014-2
to the following:
RBW 1 MHz
Center 500 MHz
Span 5 MHz
Ref.-Level -20 dBm
ATT 10 dB
Scale 5 dB/Div
Marker active
Video fi lter active
(Max Hold, Average and Tracking Generator not activated)
The Synthesizer is set to the following (applies to all 3 fi lter
checks, except 9 kHz where the frequency is fi rst set, then
varied):
Frequency 500 MHz
Amplitude -20 dBm
Output On
Modulation Off
Sweep Off
Set the marker to the left and right side of the fi lter response
shown, so that the marker level displayed is –26.0 dBm. Note
the 2 frequencies at these 2 points and subtract them. The dif-
ference obtained may be in the range of 700 kHz and 1200 kHz.
The HM5014-2 has the RBW values defi ned as the –6 dB points
to follow standard EMC bandwidth defi nitions.
Then change the settings:
RBW 120 kHz
Span 1 MHz
Repeat the procedure described above with this fi lter also, note
the 2 frequencies and subtract them. The result may be in the
range 90 – 140 kHz.
The measurement of the 9 kHz fi lter is accomplished using
measurement setup I, but a different approach is used to get
the bandwidth value.
Set the HM5014-2 to the following:
RBW 9 kHz
Center 500 MHz
Span Zero span
Ref.-Level -20 dBm
ATT 10 dB
Scale 5 dB/Div
Marker active
Video fi lter active
(Max Hold, Average and Tracking Generator not activated)
To get the 2 corner frequencies at (–6 dB), use the HM8134-3
with the rotary encoder active for setting the frequency of the
RF generator in steps of 100 Hz. Then vary the frequency until
the reading of the marker is –26 dBm, and note the frequencies
on both slopes of the 9 kHz fi lter at this point (the frequency is
displayed on the RF generator). Subtract the 2 obtained values,
the result may be in the range of 5.5 – 10 kHz.
2.2.8 Check of 5 dB/Div adjustment
In order to check the 5 dB/Div adjustment, use measurement
setup I and set the HM 8134-3 to the following:
Frequency 500 MHz
Amplitude -30 dBm
Output On
Modulation Off
Sweep Off
Select item „5dBADJ“ in the internal adjustment menu as
described in section 2.2.1. The “OSCCAL”-text will change to
“S10MHz”. Now switch through the ATT settings from 0 dB
to 40 dB and observe the location of the center of the trace
on the CRT. No marker function is available for this test. The
trace must change 2 graticule divisions for each attenuator
step, and the value for the 10 dB attenuator step may be in the
range of 1,6 to 2,4 graticule divisions from the top of the CRT
graticule grid.
Switch off the unit to leave the adjustment menu.
2.2.9 Check of test signal level
To check the test signal level, it is very important that a cor-
rect warmup of the instrument has taken place and that the
instrument is operated at the ambient temperature indicated
in the specifi cations of the HM5014-2.
Set the HM5014-2 to the following:
Center 48 MHz
Span Zero span
RBW 1 MHz
ATT 10 dB
Marker active
Test signal active
(Max Hold, Average, Video fi lter and Tracking Generator not
activated)
2. Performance and Functional Tests
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