496: Difference between revisions

Latest revision as of 06:29, 12 December 2023

Tektronix 496
1.8 GHz Spectrum Analyzer Tektronix 496 Produced from 1982 to 1989 Manuals Tektronix 496 and 496P Operators Manual Tek 496 & 496P Service Manual Volume 1 Tek 496 & 496P Service Manual Volume 2 Tek 496P Programmers Manual Tektronix 496 Introduction Spec (OCR) Tektronix 496 Final Spec (OCR) (All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

The Tektronix 496 is a spectrum analyzer with a frequency range of 1 kHz to 1.8 GHz, introduced in 1982. The 496P model is GPIB programmable.

Non-volatile memory (NVRAM) can store up to 9 waveform displays, 10 complete front panel measurement parameter setups, and 8 K for programming macros of commonly used routines.

Key Specifications

Frequency	1 kHz to 1.8 GHz
Frequency Span	50 Hz to 100 MHz in 1, 2, 5 sequence (plus 0 Hz and MAX)
Resolution Bandwidth	30 Hz; 100 Hz to 1 MHz in decade steps (-6 dB bandwidth)
RF Input	50 Ω; max. +30 dBm (1 W) CW; max. 75 W peak @ 1 µs pulse, 0.1% duty factor
RF Attenuator	0 to 60 dB, 10 dB steps
Reference Level	−123 dBm to +40 dBm
Sweep Speed	10 sec/div to 20 µs/div in 1, 2, 5 sequence
Video Bandwidth	0.3 Hz to 30 kHz
Triggering Modes	Free Run, Line, Video, Single, External
Displayed Average Noise	−30 dBm to −131 dBm
Display Dynamic Range	80 dB
Calibrator	50 Ω, -20 dBm ±0.3 dB at 100 MHz (Opt. 07: 75 Ω, +20 dBmV ±0.3 dB at 100 MHz)
Weight	20 kg (44 lbs)
Power	90 − 132 V_AC, 48 to 440 Hz; 180 – 250 V_AC, 48 to 440 Hz, 210 W max
Features	Continuous resolution frequency tuning Markers provide direct readout of frequency and amplitude (single and delta) Built-in intelligence for signal processing/marker functions Pushbutton Occupied Bandwidth / Noise Normalization functions Macro Capability Optional switch-selectable 50 Ω/75 Ω Impedance GPIB Programming

Options

Opt. 07: 75 Ω dBmV input and calibration in addition to the normal 50 Ω dBm input and calibration. (Not combinable with Opt. 21 and 22; no external mixer capability). Include 42-inch 75 Ω BNC-BNC coax cable and BNC male to “F” female adapter.
Opt. 30: Rackmount with front panel input/outputs
Opt. 31: Rackmount with rear panel input/output capability
Opt. 32: Benchmount. Adds side and top panels, carrying handles and feet for a stackable benchtop configuration
Opt. 42: Replaces MARKER/VIDEO input port on the rear panel with a 110 MHz IF output port that provides a 3 dB signal bandwidth ≥ 4.5 MHz

Front panel inputs/outputs

RF INPUT, N connector, 50 Ω; Opt. 07 adds RF INPUT 75 Ω, TNC connector
CAL OUT, BNC connector
1ST LO OUTPUT, SMA connector (must be terminated into 50 Ω when not connected)
2ND LO OUTPUT, SMA connector (must be terminated into 50 Ω when not connected)
Camera power

Rear panel inputs/outputs:

PROBE POWER, LEMO S-series connector – ±15 V, +5 V; 100 mA max each
HORIZ/TRIG (EXT IN), BNC connector – In External Triggering mode, AC coupled input for trigger signals; When TIME/DIV selection is EXT, DC coupled input for horizontal sweep voltages.
MARKER/VIDEO (EXT IN), BNC connector – Interfaces with a Tektronix 1405 TV Adapter to display an externally-generated marker
110 MHz IF (OUTPUT), BNC connector – Available on Opt. 42 utilizing the HORIZ (OUTPUT) connector; 110 MHz IF output with a bandwidth greater than 5 MHz
HORIZ (OUTPUT), BNC connector – 0.5 V/div horizontal signal
VERT (OUTPUT), BNC connector – Video signal, 0.5 V/Div
PEN LIFT (OUTPUT), BNC connector – TTL compatible (In Opt. 42 instruments, external video input if pin 1 of the ACCESSORIES connector is grounded)
10 MHz IF (OUTPUT), BNC connector
EXT REF IN, BNC connector – 50 Ω input for 1, 2, 5, or 10 MHz external sinewave reference signal, –15 dBm to +15 dBm
J104 ACCESSORY (B053575 AND UP) female, DB25 connector – Bidirectional access to the instrument bus
IEEE STD 488 PORT

Original included Accessories: Operator’s Manual; Operator’s Handbook; 6-ft 50Ω coaxial cable N-N; 18-inch 50Ω coaxial cable BNC-BNC; N male to BNC female adapter; rear connector shield; Power Cord; spare fuses; CRT filter set consisting of visor, blue, amber and gray light filters plus mesh filter; 496P only: Programmer Manual and GPIB cable

Links

Comparison of 494 with 492 and 7L18
49x Service notes @ John Miles KE5FX
YouTube: Tektronix 492 and 496 Portable Spectrum Analyzers
TekWeek 1982: Tektronix taking new products to NAB convention in Dallas, TX

Pictures

496P

Front view
Rear view
Tek 496 with TR503 tracking generator displaying a filter's frequency response plot