HP 8656 Series User Manual

HP 8657AlB Option 022
specifications
SPECIFICATIONS desrribe the insments warranted
performance and apply aRer a 30 minute warm-up. AU
SPECIFICATIONS am valid over the sqpal generatds entire
Opera!h@nvironrnental Range dew otherwk noted
SUPFIEMENTAL CHARACTERISTICS (shown in italics) are
intended to provide additional information useful in applying
the instnunent by giving typical (eKpected), but not warmnted
performance.
Analog Modulation Mode
When the 0.3 GMSK modulator is turned off or a
clock signal is absent, these instruments perform
as standard HP 8657As or HP 8657Bs. Please
refer to the HP 8657A or HP 8657B specifications
for complete analog mode performance.
0.3 GMSK MODULATION
Modulation Format: 0.3 GMSK
Pre-modulation Filter: Gaussian LPF
Bandwidth x Data Rate IBT): 0.3
Data Rate: 270.833 kHz If 1 kHz).
Modulation Phase Error
890 to 960 MHz and 10 to 130 MHz:
3" rms, typically lo.
8" peak, typically 5O.
1030 to 2060 MHz (HP 8657B only):
3.5" rms, typically 1.5O.
9' peak, typically 60.
Frequency Error: 10 Hz; fc 4030.
20 Hz: fc 2 1030 MHz (HP 8657B onlv).
Inputs: serial data and clock.
0.3 GMSK Digital Modulation Mode
Outputs (HP 8657B only): Baseband 0.3 GMSK
I and Q signals.
FREQUENCY
Range:
Data Normal:
HP 8657A: 520 MHz to 1040 MHz.
HP 8657B; 520 MHz to 2060 MHz.
Data Inverted: 10 MHz to 130 MHz.
SPECTRAL PURITY
Harmoniw: c-30 dBc.
<-25 dBc; fc 2 1030 MHz (HP 8657B only).
Nonharmonic Spurioua (>I80 kHz offsets):
<-50 dBc.
Noise Floor: <-100 dBc.
SUPPLEMENTAL CHARACTERISTICS
Input 8:
Data: TTL high represents a "1".
Ckk: kta accepted on rising edge.
Input Levels: Nominally TTL.
Input Impehe: Nominally 1 kR
Tim to output modulation afler clock input:
25 microseconds.
Time to cease modulatwn aper clock
discontinued. 35 microseconds.
Baseband 0.3 GMSK I and Q Output Leuek
Typically 5 volts into a 50R load.
Simultaneous Modulation: AM / FM /pulse / 0.3
GMSK.

HP 8656 Series Specifications

General

Brand	HP
Model	8656 Series
Category	Portable Generator
Language	English