Signal Sources
210 Economy RF Signal Generators
HP 8647A
HP 8648A
HP 8648B
HP 8648C
HP 8648D
• ±1 dB level accuracy through 2.5 GHz
• 4 Hz residual FM at 500 MHz
• Electronic attenuator (1 GHz models)
• +10/+13 to –136 dBm output power
• Simple, dependable operation
• Pager signaling (HP 8648A Option 1EP)
HP 8648A/B/C/D
HP 8647A and HP 8648A/B/C/D Synthesized 1
Signal Generators
Superior Value in Economy Signal Generators
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The HP 8647A and 8648A/B/C/D family of synthesized signal generators delivers solid performance and reliability at an affordable price.
These signal generators provide the features and performance needed
for semi-automated receiver testing and for use in a variety of general-purpose applications over a 9 kHz to 4000 MHz frequency range.
High Reliability and Simplicity
Designed to Hewlett-Packard’s stringent quality specifications, these
signal generators provide consistent performance. The all-electronic attenuator in the HP 8647A and 8648A easily handles millions of amplitude cycles with highly repeatable output levels.
An easy-to-use front panel interface shor tens the operator’s learning curve and increases productivity. A front panel organized in functional blocks speeds identification of the task and simplifies operation.
Ideal for Manufacturing and Semi-Automated Test
The HP 8647A and 8648 series are ideal for manufacturing high-volume
products such as cordless telephones, pagers and two-way radios. The
HP 8647A is the basic model providing essential performance. The
HP 8648 series provides enhancements in frequency range, residual FM,
level accuracy, and phase noise, in addition to optional high power, pulse
modulation, and waveform modulation. The HP 8648 series provides
±1 dB absolute amplitude accuracy up to 2.5 GHz. All of the models offer
ultra stable dc FM, with ±500 Hz carrier frequency accuracy below frequencies of 1001 MHz, and low RF leakage.
Applications such as receiver tuning and alignment benefit from the
simple user interface. These signal generators are so easy to learn and use
that experienced operators are no longer required. With 300 full storage
registers and ten user-definable sequences, the signal generator easily
adapts to any test procedure. Once setups are stored in registers, operators can quickly sequence through them, either from the front panel or
through a remote keypad (HP 83300A). In addition, the HP 83301A memory inter face provides the means to transfer register information from one
HP 8647/48 to another.
For automated test applications, the HP 8647/48 offers full HP-IB
programmability and uses SCPI programming codes. In addition, the
HP 8648 series reduces software development costs by providing full HPIB code compatibility with the HP 8656B and 8657A/B signal generators.
New Cost-Effective Pager Testing
The HP 8648A with Option 1EP provides an economical, one-box solution
for pager test. Option 1EP adds the pager encoding capability for POCSAG,
FLEX, and FLEX-TD formats to the HP 8648A. Ideal for pager test applications, the HP 8648A with Option 1EP offers superior frequency accuracy,
deviation accuracy, and dc FM performance.
Specifications
Frequency
HP 8647A: 250 kHz to 1000 MHz
HP 8648A: 100 kHz to 1000 MHz
HP 8648B: 9 kHz to 2000 MHz
HP 8648C: 9 kHz to 3200 MHz
HP 8648D: 9 kHz to 4000 MHz
Resolution
HP 8647A: 1 Hz; HP 8648A/B/C/D: 0.001 Hz
Display: 10 Hz
Switching Speed (typical)
HP 8647A: < 120 ms
HP 8648A/B/C/D: <1001 MHz: < 75 ms; ≥1001 MHz: < 100 ms
Accuracy (after one hour warm-up and within one year calibration):
Typically ± 3 x 10
frequency in Hz for Option 1E5 (typically ± 0.072 x 10
Internal Reference Oscillator
Accuracy and Stability (calibration adjustment dependent;
after one hour warm-up and within one year of calibration),
± aging rate ± temperature effects ± line voltage effects
Aging < ± 2 ppm/yr < ± 0.1 ppm/yr;
Temperature < ± 1 ppm < ± 0.01 ppm (typ.)
Line Voltage (± 5%) < ± 0.5 ppm N/A
Output: 10 MHz, typically > 0.5 V
External Reference Oscillator Input: Accepts 2, 5, 10 MHz ±5 ppm
and a level range of 0.5 V to 2 V
Spectral Purity
Harmonics (output ≤4 dBm): < –30 dBc
Subharmonics (output ≤+4 dBm) < 1001 MHz: –60 dBc;
≥1001 MHz: –50 dBc; > 3200 MHz: –40 dBc
Nonharmonics (≥5 kHz offset, ≤+4 dBm output level)
HP 8647A: < –60 dBc (–55 dBc from 220 to 250 MHz)
HP 8648A/B/C/D
< 249 MHz: < –55 dBc; < 2001 MHz: < –54 dBc
< 1001 MHz: < –60 dBc; ≤4000 MHz: < –48 dBc
Residual FM (CCITT, rms)
HP 8647A
< 249 MHz: < 20 Hz, typically < 11 Hz
< 501 MHz: < 10 Hz, typically < 6 Hz
≤1000 MHz: < 20 Hz, typically < 11 Hz
HP 8648A/B/C/D
< 249 MHz: < 7 Hz, typically < 4 Hz
< 501 MHz: < 4 Hz, typically < 2 Hz
< 1001 MHz: < 7 Hz, typically < 4 Hz
< 2001 MHz: < 14 Hz, typically < 8 Hz
≤4000 MHz: < 28 Hz, typically < 12 Hz
SSB Phase Noise (at 20 kHz offset, typical)
HP 8647A
@ fc 500 MHz: < –110 dBc/Hz; @ fc 1000 MHz: < –106 dBc/Hz
HP 8648A/B/C/D
@ fc 500 MHz: < –120 dBc/Hz; @ fc 3000 MHz: < –106 dBc/Hz
@ fc 1000 MHz: < –116 dBc/Hz; @ fc 4000 MHz: < –104 dBc/Hz
@ fc 2000 MHz: < –110 dBc/Hz
Output
Range
HP 8647A and 8648A: +10 to –136 dBm
HP 8648B/C/D: ≤2500 MHz: +13 to –136 dBm;
> 2500 MHz: +10 to –136 dBm
Max. Power with Option 1EA (High Power) on HP 8648B/C/D only
Freq. (MHz) < 0.1 ≤1000 ≤1500 ≤2100 ≤2500 ≤4000
Power (dBm) +17 +20 +19 +17 +15 +13
Display Resolution: 0.1 dB
Accuracy (specified power < 13 dBm to –127 dBm)
HP 8647A: ± 1.5 dB
HP 8648A/B/C/D (applies at 25˚ ± 5˚ C):
≤2500 MHz: ± 1.0 dB
≤3200 MHz: ± 1.5 dB (≥–100 dBm; ± 3.0 dB < –100 dBm)
≤4000 MHz: ± 2.0 dB (≥–100 dBm; ± 3.0 dB < –100 dBm)
Reverse Power Protection (watts into 50 Ω)
HP 8647A and 8648A/B: 50 watts
HP 8648C/D: 50 watts ≤2000 MHz; 25 watts > 2000 MHz
–6
x carrier frequency in Hz, ± 0.15 x 10–6x carrier
Standard Timebase Option 1E5
rms
into 50 Ω
rms
into 50 Ω
–6
x fc)
< ± 0.0005 ppm/day
Signal Sources
211Economy RF Signal Generators
SWR: (output < –6 dBm, typical)
HP 8647A: < 2.0:1
HP 8648A/B/C/D:
< 249 kHz: < 2.5:1
≤2500 MHz: < 1.5:1
≤3200 MHz: < 2.0:1
Output Impedance: Nominally 50 Ω
Frequency Modulation
Peak Deviation
(rates > 25 Hz ac FM) 8647A 8648A/B/C/D
< 249 MHz 0 to 100 kHz 0 to 200 kHz
< 501 MHz 0 to 50 kHz 0 to 100 kHz
< 1001 MHz 0 to 100 kHz 0 to 200 kHz
< 2001 MHz N/A 0 to 400 kHz
≤4000 MHz N/A 0 to 800 kHz
Resolution
For ≤10% peak deviation
< 2001 MHz: 10 Hz
≥2001 MHz: 20 Hz
For > 10% to maximum peak deviation
< 2001 MHz: 100 Hz
≥2001 MHz: 200 Hz
Deviation Accuracy (internal 1 kHz rate)
HP 8647A: ± 7.5% of FM deviation ± 30 Hz
HP 8648A/B/C/D
< 1001 MHz: ± 3% of deviation ± 30 Hz
< 2001 MHz: ± 3% of deviation ± 60 Hz
≤4000 MHz: ± 3% of deviation ± 120 Hz
HP 8648A Option 1EP only:
50 Hz at 276 to 284 MHz, 406 to 512 MHz, and 929 to 932 MHz
Rates
HP 8647A
Internal: 400 Hz or 1 kHz
External dc: DC to 75 kHz (typical, 3 dB BW)
External ac: 20 Hz to 75 kHz (typical, 3 dB BW)
HP 8648A/B/C/D
Internal: 400 Hz to 1 kHz (10 Hz to 20 kHz for Option 1E2)
External dc: dc to 150 kHz (typical, 3 dB BW)
External ac: 1 Hz to 150 kHz (typical, 3 dB BW)
Distortion (1 kHz rate, THD + N, 0.3 to 3 kHz BW)
< 1001 MHz: < 1% at deviations > 4 kHz
< 2001 MHz: < 1% at deviations > 8 kHz
≤4000 MHz: < 1% at deviations > 16 kHz
HP 8648A/B/C/D 88 to 108 MHz: < 0.5% at deviations ≥75 kHz
Carrier Frequency Accuracy (relative to CW in dc FM, at 25˚ ± 5˚ C)
< 1001 MHz: ± 100 (typ. 40*) Hz, deviations < 10 kHz
< 2001 MHz: ± 200 (typ. 80*) Hz, deviations < 20 kHz
≤4000 MHz: ± 400 (typ. 160*) Hz, deviations < 40 kHz
FM + FM: Internal 1 kHz to 400 Hz source plus external. In internal plus
external FM mode, the internal source produces the set level of deviation. The external input should be set to ≤±0.5 V peak or 0.5 Vdc (onehalf the set deviation).
Phase Modulation
Peak Deviation
< 249 MHz: 0 to 10 radians
< 501 MHz: 0 to 5 radians
< 1001 MHz: 0 to 10 radians
< 2001 MHz: 0 to 20 radians
≤4000 MHz: 0 to 40 radians
Resolution
< 2001 MHz: 0.01 radian
≥2001 MHz: 0.02 radian
Deviation Accuracy (internal 1 kHz rate, typical)
HP 8647A: ± 7.5% of deviation ± 0.05 radians
HP 8648A/B/C/D
< 1001 MHz: ± 3% of deviation ± 0.05 radians
< 2001 MHz: ± 3% of deviation ± 0.1 radians
≤4000 MHz: ± 3% of deviation ± 0.2 radians
Rates
Internal: 400 Hz or 1 kHz (10 Hz to 20 kHz for Option 1E2,
8648A/B/C/D only)
External: 20 Hz to 10 kHz (typical, 3 dB BW)
Distortion (1 kHz rate)
HP 8647A < 2% at deviations ≥3 radians
*Within one hour after dc FM calibration
HP 8648A/B/C/D
< 1001 MHz: < 1% at deviations ≥3 radians
< 2001 MHz: < 1% at deviations ≥6 radians
≤4000 MHz: < 1% at deviations ≥2 radians
Amplitude Modulation
(AM is not specified below 1.5 MHz and is typical above 1001 MHz.)
Range: 0 to 100%; output ≤+4 dBm
Resolution: 0.1%
Accuracy (1 kHz rate): ± 5% of setting ± 1.5% (for HP 8648B/C/D,
specification is applicable at 25˚ ±5˚ C and < 70% depth)
Rates
Internal: 400 Hz or 1 kHz (10 Hz to 20 kHz for Option 1E2,
8648A/B/C/D only)
External dc: dc to 25 kHz (typical, 3 dB BW)
External ac: 1 Hz to 25 kHz (typical, 3 dB BW)
Distortion (1 kHz rate, THD+ N, 0.3 to 3 kHz BW)
HP 8647A and 8648A: @ 30% AM: < 2%; @ 90% AM: < 3%
HP 8648B/C/D: @ 30% AM: < 2%; @ 70% AM: < 3%
Pager Test Option 1EP (HP 8648A only)
Signaling Formats: POCSAG, FLEX, and FLEX-TD (RCR-43)
Pulse Option 1E6 (HP 8648B/C/D only)
On/Off Ratio: > 80 dB < 2000 MHz;> 70 dB ≥ 2000 MHz
Rise/Fall Times: < 10 ns
Modulation Generator Option 1E2 (HP 8648A/B/C/D only)
Adds variable frequency modulation generator.
Frequency Range: Sine: 10 Hz to 20 kHz;
Square, Triangle, Sawtooth: 100 Hz to 2 kHz
Frequency Accuracy: ± 0.01% typical
Frequency Resolution: 1 Hz (3 digits displayed)
Modulation Source
Internal: 400 Hz or 1 kHz, front panel BNC connector provided
at nominally 1 V (p-p) into 600 Ω
External: 1 V peak into 600 Ω(nominal) required for full scale modula-
tion. (High/Low indicator provided for external signals ≤10 kHz.)
Remote Programming
Interface: HP-IB (IEEE-488.2-1987) with Listen and Talk
Control Languages: SCPI version 1992.0. The HP 8648A/B/C/D are
code compatible with the HP 8656B and 8657.
Functions Controlled: All front panel functions except power
switch and knobs
IEEE-488: SH1, AH1, T6, TE0, L4, LE0, SR1, RL1, PP0, DC1, DT0, C0, E2
ISO Compliant
The HP 8647A and 8648A/B/C/D signal generators are manufactured
in an ISO 9002 registered facility in concurrence with HP’s commitment to quality.
General
Power Requirements: 90 to 264 V, 48 to 440 Hz; 170 VA max.
Operating Temperature: 0˚ to 50˚ C
Leakage: Conducted and radiated interference meets MIL-STD-461B
RE02 and FTZ 1046. Typically < 1 µV.
Key Literature
HP 8647A and 8648A/B/C/D Data Sheet, p/n 5965-3432E
Signal Generator Selection Guide
HP 8647A and 8648A/B/C Brochure, p/n 5962-6191E
HP 8648A Option 1EP Pager Encoder Datasheet, p/n 5964-4116E
, p/n 5965-3094E
Ordering Information
HP 8647A Synthesized Signal Generator
HP 8648A Synthesized Signal Generator
HP 8648B Synthesized Signal Generator
HP 8648C Synthesized Signal Generator
HP 8648D Synthesized Signal Generator
Opt 1EA High Power (HP 8648B/C/D only)
Opt 1EP Pager Encoder (HP 8648A only)
Opt 1E6 Pulse (HP 8648B/C/D only)
Opt 1E2 Modulation Generator
Opt 1E5 High-Stability Timebase
Opt 1CM Rack Kit, p/n 08647-61020 (HP 8647A)
Opt 1CM Rack Kit, p/n 08648-60001 (HP 8648)
HP 83300A Remote Interface
HP 83301A Memory Interface
HP 8647A
HP 8648A
HP 8648B
HP 8648C
HP 8648D
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Internet URL www.hp.com/go/tmc99 Product & Order Info See inside back cover
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