7B92: Difference between revisions

7B92 (view source)

Revision as of 23:30, 1 October 2014

498 bytes added , 1 October 2014

Hf sync mode

Peter

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 * [http://w140.com/smb/7b92a_sm.pdf Tektronix 7B92A Service Manual (OCR, PDF)]
 }}
-The Tektronix 7B92 is a 500 MHz timebase plug-in for [[7000-series scopes]].  It was introduced along with the [[7904]] mainframe in 1972.
+The Tektronix 7B92 is a 500 MHz dual timebase plug-in for [[7000-series scopes]].
+It was introduced along with the [[7904]] mainframe in 1972.
-The 7B92 uses a discrete trigger circuit containing [[tunnel diodes]].
+An "HF Sync" triggering mode is provided in which the trigger level
+control varies the frequency of a built-in oscillator to lock on to the input
+for  input signals from 100 to 500 MHz, providing higher sensitivity than the
+direct trigger (which is specified up to 500 MHz as well).
-Up to serial number B069999, the 7B92A used a discrete trigger circuit.
+Internal jumpers are provided to configure the 7B92 for operation in 7800/7900 vs. slower mainframes,
-After that, the 7B92A used a [[155-0061-00]] trigger amplifier followed by a
+and to select whether the variable control affects the delaying or the delayed time base.
-[[155-0150-00]] trigger detector.
 ==Specifications==
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 {{Spec | Ext Trig input | 1 MΩ // 20 pF or 50 Ω }}
 {{EndSpecs}}
+==Internals==
+The 7B92 uses a discrete trigger circuit containing [[tunnel diodes]].
+Up to serial number B069999, the 7B92A used a discrete trigger circuit.
+After that, the 7B92A used a [[155-0061-00]] trigger amplifier followed by a
+[[155-0150-00]] trigger detector.
 ==Pictures==