GP1665H - Programmable Signal Source/Function Generator - HP 8165A Compatible

GP1665H – Programmable Signal Source / Function Generator

Programmable Signal Source/Function Generator - HP 8165A Compatible
  • 100% Form-Fit-Function compatibility with Hewlett Packard 8165A Programmable Signal Source/Function Generator
  • Generates sine, sawtooth, square, triangle, and DC waveforms
  • Frequency range from 1 mHz to 50 MHz
  • 4 digit resolution
  • PLL stability
  • Trigger and modulation modes
  • Logarithmic sweep
  • FM and AM modulation


The GP1665H function generator is a programmable instrument capable of generating predefined sine, square, triangle, sawtooth, and DC waveforms. The firmware is customized for the HP 8165A GPIB command set. Software test procedures using the original HP8165A instrument require no code modification when upgrading to the GP1665H.



Automatic Test Equipment (ATE)
Component Analysis
Communication Signals
Process Control


The GP1665H offers phase-lock loop (PLL) for stability and accuracy up to 50MHz as well as precision low-frequency waveform for trigger, gate, and burst modes. A selectable 20%-50%-80% duty cycle up to 20 MHz allows versatility in linear applications using sawtooth and rectangular waveforms.
The GP1665H provides internal storage of up to 10 complete sets of parameters and settings by using its internal non-volatile memory. This allows current settings to be saved in case of power failure.
Additionally, the GP1665H gives users the option of logarithmic sweeps over three decades as well as a VCO mode for sweeps go-ing down to 1 µHz. Trigger and modulation modes are available for applications needing modulated bursts. Trigger modes can be used in conjunction with AM or FM from 1 mHz to 50 MHz.


GP1665H : Programmable Signal Source/Function Generator – HP 8165A Compatible

GP165X-EAR : Rack-Mount Kit for GP1650


Operating Modes
Continuous Continuous waveform is generated, phase locked to an internal 10 MHz crystal reference.
VCO External voltage (1 kHz max) from 10 mV to 10 V lin-early sweeps 3 decades up to top of decade in which function generator is set. Twelve overlapping ranges cover 1 µHz to 50 MHz.
Trigger Pos. ext input pulse >10 ns wide generates one out-put cycle. Upper level >+250 mV, lower level <0 V.
Gate Oscillator enabled when ext input >= ± 250 mV, disabled when <=0 V. First and last output cycles are always complete.
Burst A preprogrammed number of output cycles is generated. Min time between bursts 50 ns Burst length 0 to 9,999 cycles. Min trigger pulse width 10 ns
FM 0 to ±1 V modulates with ±1% deviation.
AM 0 to 2.5 Vpk-pk modulates 0 to 100% modulation depth
Sweep Provides logarithmic up/down sweep of up to three decades between limits set on the function generator. Eleven overlapping ranges cover 1 µHz to 50 MHz.
Timing Parameters
Frequency 0.001 Hz – 50 MHz, sine and square
Resolution 4 digits
Accuracy ±0.001%
Jitter 0.1% for FRQ>1 KHz, 0.02% for FRQ<999 Hz
Stability 1ppm
Duty Cycle 20%-50%-80%
Amplitude Characteristics
Range 10 mV – 10 Vpk-pk into 50 Ω
Resolution 3 digits
Accuracy ±3% to 5 MHz, ±8% to 20 MHz, ±5%/-20 % to 50 MHz for sine waveforms
Offset Characteristics
Range 0 to ±5 V into 50 Ω
Resolution 3 digits
Accuracy ±1% setting, ±1% AMP, ±20 mV
Waveform Performance
Sine THD <-40 dB to 5 MHz, <-30 dB to >5 MHz
Square Transition <5 ns, 10% to 90%
Square Aberrations <±5%
Waveforms Sine, square, triangle, sawtooth, and DC
Band 3 decades max.
Ranges ±1 µHz – 50 MHz
Mod Bandwidth DC-100 KHz
FM 1% max deviation for ±1 V input
Mod Bandwidth DC-20 KHz
AM Depth 100% for ±2.5 V input
AM Bandwidth DC-100 KHz
Sweep Mode
Log Sweep Up-down, full frequency range available
Sweep Time 0.01/0.1/1/10/100/1,000 s per decade selectable
Repetition Continuous or triggered
Output 0 V – 2.99 V triangle, 50 Ohms impedance
Output Characteristics
Output modes Invert, disable, 50 Ohm/1 K selectable
Output Range ±10 V into 50 Ω, ±20 Vpk-pk into 1 K or open
Source Impedance 50 Ω, ±0.5%
Inputs and Outputs
Sync Output 1.5 V into 50 Ohms, 50% duty cycle, 50 Ohms impedance
External Trigger High >250 mV, positive slope 10 nx min pulse, 10 K IN impedance
VCO Input 10 mV – 10 V, 10 KOhms IN impedance
Modulation Input Max ±20 V, 10 KOhm IN impedance
Interface Fully compatible with HP8165A
Memory 10 setups
Power Requirements 100-240 V selectable, 50 VA max
Weight 5 Kg
Dimensions 13.0 cm (5.25″) H x 21.2 cm (8.3″) W x 40 cm (15.75″)L
0° C to 50° C
Humidity To 95% RH, 0° C to 40° C
Connectors Rear panel connectors optional
Rack Mount Optional
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