HP 70908A RF Section, 100 Hz to 22 GHz

The HP 70908A RF section provides fundamentally mixed 100 Hz to 22 GHz broadband input conversion for the HP 71210C spectrum analyzer and the HP 71400C lightwave signal analyzer. Fundamental mixing provides a means of achieving unprecedented sensitivity for microwave measurements and for high speed lightwave modulation rates. This sensitivity allows you to reduce microwave spurious test times from days to hours. Improved sensitivity also improves second and third order dynamic range. Excellent dynamic range is obtained with an analyzer with both good sensitivity and good distortion performance (TOI and SOI).

The internal preselector dynamically tracks the analyzer's tuning. This means the preselector is continuously peaked, which saves you time and provides excellent amplitude accuracy.

The HP 70908A also contains a 70 dB step attenuator variable in 10 dB steps. Option H25 provides a 5 dB step attenuator. The 321.4 MHz IF output allows you to access the converted RF signal. You can then detect and display this signal on external equipment. The first LO auxiliary output allows operation with tracking generators and external mixer interface modules.

[ Features ]

Fundamental mixing provides 100 Hz to 22 GHz broadband input conversion
Achieves unprecedented sensitivity for microwave measurements and for high-speed lightwave modulation rates.
Dynamically-tracked preselector provides superior amplitude accuracy without preselector peaking
Excellent dynamic range
Contains a 70 dB step attenuator variable in 10 dB steps, Option H25 provides a 5 dB step attenuator

[ Specifications ]

General Specifications
Inputs/Outputs
RF Input:			type N (f), front panel, 50 ohms (nominal)
LO Emissions
  0 to 2.9 GHz:			< -100 dBm low band (10 dB atin)
  2.7 to 22 GHz:		< -50 dBm high band
VSWR (>=10 dB attn)

	Frequency (GHz)		VSWR (nominal)
	--------------------------------------
	0 to 12.8		<1.9:1
	12.8 to 18.0		<2.3:1
	18.0 to 22.0		<2.5:1

321.4 MHz IF Out:		SMB (m), rear panel, 50 ohms (nominal, switched)
				available for all input frequencies
Bandwidth:			>15 MHz
Amplitude Level:		-15 dBm for -10 dBm input to mixer (nominal)
First LO Auxiliary Out:		 SMA (f), rear panel, 50 ohms (nominal);
				VSWR (>=10 dB attn.) < 3:1
Frequency Range:		3.0 to 6.6 GHz
Power Range:			+5 to 10 dBm

[ Ordering ]

HP 70908A RF Section Opt 098 Controller Board Upgrade Kit HP 70860Aš Opt 099 RAM/ROM Upgrade Kit HP 70861Aš Opt 1BH General Export License Opt 1BN Certificate of Calibration Opt lBP Certificate of Calibration and Data Opt 910 Extra User's Manual Opt 915 Service Manual Set šIf this module will be installed into an existing system, a firmware upgrade may be required. Modules with firmware version B.04.02 (920325) and earlier require upgrade HP 70860A. Modules with later version firmware may use upgrade HP 70861A. For more information see service note 70900A-14L / 70900B-01G.

[ Assistance ]

To help you make the right instrument choices

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