Re: Can an 8444A be used with an 8569B?
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Hi,
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Effectively, you need option 059, or a stable external source at 500 MHz. Obviously, the band stops at the limit of the 8444A and not that of the 8569B, max 1500 MHz. As for the 0-10V sweep voltage, this has no effect on the 8444A as it has no input for this signal. This is not a ramp that synchronizes and controls the output frequency of the 8444A, but rather the RF source of the first LO of the 8569B (2060-3550 MHZ) mixed with the sum of the source at 500MHz and the cavity oscillator at 1550 MHz (total 2050 MHz) which will give the output of the tracking generator 8444A, 10MHz to 1500 MHz at the input of the 8569B. In manual scan mode, the 8444A provides a 0-10V voltage at the output of the SCAN OUT connector which will go to the SCAN INPUT connector of the Spectrum (EXT SWEEP for the 8569B), and the 8444A will receive the frequency of the first LO corresponding to the chosen voltage. But I am intrigued by the information about the 8444A and 8566A talking about this, I will try to find it, but if you had the volume number and page it would be faster for me. Yves -----Message d'origine-----
De?: [email protected] <[email protected]> De la part de Don Bitters via groups.io Envoy¨¦?: 12 novembre 2024 00:52 ??: [email protected] Objet?: Re: [HP-Agilent-Keysight-equipment] Can an 8444A be used with an 8569B? It might be possible, but would involve several issues. The 8444A was designed to be used with an 8554A/L, 8555A, and later an 8558A, and later still with and 8568A/B. Does the 8444A have the internal 500MHz oscillator option - options 058 or 059, if not you would have to supply an external 500MHz stable @10dBm or higher. IIRCC, the expected sweep voltage is 0 to +10V, the 8569B does have an external sweep ramp that I believe is also 0 to +10V, but the sweep ramp linearity may not match exactly, in which case you would need to make a sweep offset/gain matching circuit (as described in the 8566A OP/Serv manual, under alignment tools). The track gen sweep range will very much depend on the low band sweep of the 8569B - probably 10MHz - 1.3GHz, or 1.55GHz max. The low band on the 8569B is 10MHz to 1.8GHz in full band sweep - the 8444A cannot go that high, so you cannot use full band sweep, but can set the 8569B to sweep from 10MHz to 1.5GHz in the MHz per div sweep mode. An external sweep trigger is required to sync the sweep, this should come from the 8569B. Don Bitters |
