The Keysight (Agilent/HP) 11715A is a dedicated AM/FM test source designed primarily for the performance verification, testing, and calibration of the Agilent 8901A/B modulation analyzer and Agilent 8902A measuring receiver. It can also function as a high-quality modulated test oscillator, offering very flat, wide-bandwidth, and low-distortion amplitude- or frequency-modulated RF signals. Its architecture incorporates a low-noise voltage-controlled oscillator (VCO), two digital dividers, and a double-balanced mixer.
Specifications
Frequency
| Parameter | Value |
|---|---|
| Minimum Frequency | 11 MHz |
| Maximum Frequency | 432 MHz |
| Frequency Resolution | Continuously variable (analog tuning) |
| AM FM ÷ 32 Output Frequency Range | 11 to 13.5 MHz |
| FM ÷ 4 Output Frequency Range | 88 to 108 MHz |
| FM Output Frequency Range | 352 to 432 MHz |
| VCO Typical Tuning Range | 330 to 470 MHz |
| FM Broadcast Band Coverage | 88 to 108 MHz covered by the FM divide-by-4 output |
Output
| Parameter | Value |
|---|---|
| Maximum Output Power | +4 dBm (typical, AM/FM Output) |
| Output Power Range | AM/FM Output: > 0 dBm; FM ÷ 4 Output: > -2 dBm; FM ÷ 32 Output: > -15 dBm |
Modulation
| Parameter | Value |
|---|---|
| Modulation | AM, FM |
| FM Sensitivity (FM ÷ 4 Output) | 100 kHz peak deviation per volt peak |
| FM Sensitivity (FM ÷ 32 Output) | 12.5 kHz peak deviation per volt peak |
General
| Parameter | Value |
|---|---|
| Interfaces | AM/FM Output (Type-N female), FM ÷ 4 Output (BNC female), FM ÷ 32 Output (BNC female), VCO Output (BNC female), AM Input (BNC female), FM Input (BNC female), VCO Tune Input (BNC female) |
Physical
| Parameter | Value |
|---|---|
| Dimensions (W×H×D) | 88 mm × 213 mm × 345 mm |
| Weight | 2.7 kg |
Analog Modulation
| Parameter | Value |
|---|---|
| AM Distortion (50% depth, 20 Hz to 100 kHz rates) | <0.05% THD (<-66 dB) |
| AM Distortion (95% depth, 20 Hz to 100 kHz rates) | <0.1% THD (<-60 dB) |
| FM Coupling and Bandwidth | Directly coupled external modulation to VCO tune input, providing wide bandwidth and low phase shift |
| Incidental AM | Extremely low incidental AM design |
Hardware
| Parameter | Value |
|---|---|
| Key Internal Components | Low-noise voltage-controlled oscillator (VCO), 2 digital dividers, double-balanced mixer |
RF Outputs
| Parameter | Value |
|---|---|
| AM/FM Output Level | > 0 dBm (typically > +4 dBm into 50 Ω) |
| FM ÷ 4 Output Level | > -2 dBm (typically > +2 dBm into 50 Ω) |
| FM ÷ 32 Output Level | > -15 dBm (typically > -10 dBm into 50 Ω) |
| VCO Output Level | > +3 dBm into 50 Ω |
Modulation Inputs
| Parameter | Value |
|---|---|
| FM Input Impedance | 600 Ω nominal |
| AM Input Impedance | 600 Ω nominal |
| VCO Tune Input Range | 0 to -15 V (100 kΩ nominal input impedance) |
Environmental
| Parameter | Value |
|---|---|
| Operating Temperature Range | 0 °C to +55 °C |
Performance
| Parameter | Value |
|---|---|
| FM Distortion (FM ÷ 4 Output) | < 0.05% (20 Hz to 100 kHz rates, 100 kHz peak deviation) |
| FM Distortion (FM ÷ 32 Output) | < 0.05% (20 Hz to 100 kHz rates, 12.5 kHz peak deviation) |
Power Requirements
| Parameter | Value |
|---|---|
| DC Power Consumption | +15 Vdc ± 5% @ 150 mA, -15 Vdc ± 5% @ 50 mA |
| Power Source | Supplied by HP 8901A/B or 8902A modulation analyzers via interface cable |
Technology
VCO-based signal generator with frequency dividers and double-balanced mixer
Applications
Performance testing and calibration of Agilent 8901A/B modulation analyzers and Agilent 8902A measuring receivers