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PERFORMANCE TESTS
PERFORMANCE TESTS
MODEL 8559A
4
-
16.
RESOLUTION BANDWIDTH SELECTIVITY
SPECIFICATION:
60-dB/3-dB resolution bandwidth ratio:
<
15:
1
DESCRIPTION:
The 60
-
dB bandwidth is measured for all resolution bandwidths. The 60
-
to 3
-
dB resolution bandwidth ratio
(shape factor) is then computed for each bandwidth by dividing the 3
-
dB value (from the Resolution Bandwidth
Accuracy test) into the 60
-
dB value.
In the 30
-
, lo-,
3
-
,
and 1
-
kHz bandwidths, a 21.4
-
MHz signal (final IF) is injected into Bandwidth Filter No. 1
Assembly
All
to provide the stability required for the measurement of narrow resolution bandwidths.
Dl
SPLAY
SIGNAL GENERATOR
RF
OUTPUT
ADAPTER
C
A
B
L
E
ADAPTER
L
FlGURE4-11. RESOLUTION BANDWIDTH SELECTIVITY TEST SETUE
1
kHzTO
30
kHz
In the following procedure, the plug
-
in must be removed from the display
mainframe and connected through the extender cable assembly. Be very
careful; the energy at some points in the instrument will, if contacted, cause
personal injury. This test should be performed only by a skilled person who
knows the hazard involved.
EQUIPMENT:
SignalGenerator
.........................................................
HP8640B
Extender Cable Assembly
..............................................
HP 5060
-
0303
Adapter, SMB
(f)
to BNC
(f)
............................................
HP 1250
-
1236
Adapter, Type N (m) to BNC
(f)
(2
required)
...............................
HP 1250
-
0780