HP 11715A AM/FM Test Source

The HP 11715A AM/FM test source provides very flat, wide-bandwidth, and low-distortion amplitude - or frequency-modulated RF signals. Designed primarily for performance tests and adjustments of the HP 8901A/B modulation analyzer and HP 8902A measuring receiver, it will also serve as a high-quality modulated test oscillator where its frequency ranges apply.

The major components of the HP 11715A are a low-noise voltage-controlled oscillator (VCO), 2 digital dividers, and a double-balanced mixer. The VCO is the primary signal source, with a typical frequency range of 330 to 470 MHz at the FM output. FM is produced by directly coupling the external modulation source to the VCO's tune input, providing very wide bandwidth modulation with low phase shift. This design also ensures very little incidential AM. The HP 11715A can also be used in conjunction with an HP 8901A/B and an 8902A as a calibrated signal source for special applications. In particular, the U.S. commercial FM broadcast band of 88 to 108 MHz is covered by the FM divide-by-4 output of the HP 11715A.

[ Features ]

High-quality modulated test oscillator
Wide bandwidth modulation with low phase shift
Designed for low incidential AM

[ Specifications ]

FM Outputs
Frequency range:
	11 to 13.5 MHz, AM/FM divide-by-32 output
	88 to 108 MHz, FM divide-by-4 outputs
	352 to 432 MHz, FM output
Peak deviation:
	> 12.5 kHz, 11 to 13.15 MHz carrier
	>100 kHz, 88 to 108 MHz carrier
	>400 kHz, 352 to 432 MHz carrier
Distortion:
	<0.025% THD (<-72 dB)for
	Carrier frequency	Peak deviation		Modulation rate
		12.5 MHz		12.5kHz			< 10 kHz
		100 MHz			100 kHz			< 100 kHz
		400 MHz			400 kHz			< 100 kHz
Flatness:
	+/- 0.1%, dc to 100 kHz rates +/- 0.25%, dc to 200 kHz rates
Stereo Seperation:
	(88 to 108 MHz carrier, 75 kHz peak deviation, 1 kHz rate):> 60 dB typical



AM Output
Frequency range:
	(AM/FM divide-by-32 output):11 to 13.5 MHz
Depth:
	To 99%
Distortion
	<0.05% THD (<-66 dB), 50% AM, 20 Hz to 100 kHz rates
	<0.1% THD (< -60 dB), 95% AM, 20 Hz to 100 kHz rates
Flatness:
	+/- 0.1%, 50 Hz to 50 kHz rates;
	+/- 0.25%, 20 Hz to 100 kHz rates
Linearlty:
	+/- 0.1%, < 95% AM; +/- 0.2%, < 99%

[ Ordering ]

HP 11715A AM/FM Test Source Opt 907 Front handle kit Opt 910 Extra manual(s) Opt W30 3 Year Return Repair Service Opt W32 3 Year Calibration Customer Return Service Opt W34 3 Year Standards Compliant Cal Service Opt W50 5 Year Return Repair Service Opt W52 5 Year Customer Return Calibration Service Opt W54 5 Year Standards Compliant Calibration Service

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