
R&S FSP
Instrument Design and Function Description
1164.4556.82 3.5
E-1
IF Filter – Module
The frontend in the signal path is followed by the IF filter module (analog IF):
calib.
only
XTAL-Filter
LOG
dither source
LIN
Detecktor
X147
X146
X131
X132
CAL_Amp1
CAL_Amp2
StepGain
-10...+40 dB
/ 10 dB
StepGain
0...+10 dB
/ 0.1 dB
RBW 300k ... 3M
RBW 10MHz
RBW 100kHz
RBW 10MHz
RBW 300k ... 3M
IF-FILTER BOARD
Signal Path and selftest
RBW 100kHz
RBW 300kHz
A
B
C
D
LC-Filter II
LC-Filter I
Selfttest detector
selfttest detector
Selftest detektor
Selftest detektor
Fig. 3-4
IF filter
The R&S FSP offers resolution bandwidths from 1 Hz to 10 MHz in steps of 1/3/10. The selection filter at
the second IF of 404.4 MHz in the frontend yields the 10 MHz bandwidth. Selection is not performed at
the IF of 20.4 MHz.
The tunable bandwidths from 300 kHz to 3 MHz are at the third IF (20.4 MHz) on the IF filter module.
The bandwidths from 100 kHz to 3 MHz are provided by 4 decoupled LC circuits.
The IF filter module also comprises circuits for the IF gain (step gain) from 0 to 50 dB in 0.1 dB steps,
level correction for all bandwidths and frequency response correction using a variable gain amplifier
each.
The IF filters are followed by a log detector to obtain the display dynamic range.
The module also comprises a limiting amplifier (in the log-amp) with a TTL output for the frequency
counter.
For the digitally implemented resolution bandwidths from 1 Hz to 120 kHz, the 20.4 MHz IF signal at the
IF filter output is routed to the A/D converter.
Содержание 1164.4391.03
Страница 4: ......
Страница 14: ......
Страница 16: ......
Страница 18: ......
Страница 20: ......
Страница 22: ......
Страница 24: ......
Страница 92: ...Contents Adjustment R S FSP 1164 4556 82 I 2 2 E 1 This page is left blank intentionally...
Страница 103: ...R S FSP Contents Repair 1164 4556 82 I 3 3 E 1 This page is left blank intentionally...
Страница 104: ......
Страница 198: ...Contents Software Update Installing Options R S FSP 1164 4556 82 I 4 2 E 1 This page is left blank intentionally...
Страница 204: ...Contents Documents R S FSP 1164 4556 82 I 5 2 E 1 This page is left blank intentionally...
Страница 208: ...Spare Parts R S FSP 1164 4556 82 5 4 E 2 This page is left blank intentionally...
Страница 209: ...1164 4556 82 5 5 E 2 Spare Parts List Mechanical Drawings...
Страница 210: ...List of R S FSP parts including spare parts R S FSP 1164 4556 82 5 6 E 2 This page is left blank intentionally...
Страница 222: ...List of R S FSP parts including spare parts R S FSP 1164 4556 82 5 18 E 2...
Страница 223: ......
Страница 224: ......
Страница 225: ......
Страница 226: ......
Страница 227: ......
Страница 228: ......
Страница 229: ......
Страница 230: ......
Страница 231: ......
Страница 232: ......
Страница 233: ......
Страница 234: ......
Страница 235: ......
Страница 236: ......
Страница 237: ......
Страница 238: ......
Страница 239: ......
Страница 240: ......
Страница 241: ......
Страница 242: ......
Страница 243: ......
Страница 244: ......
Страница 245: ......
Страница 246: ......
Страница 247: ...11164 4556 82 5 19 E 2 Block Circuit Diagram...
Страница 248: ......
Страница 249: ......
Страница 250: ......
Страница 251: ......
Страница 252: ......
Страница 253: ......
Страница 254: ......