DS1001A • DS1001G • DS1002

Television Demodulators
Поставка указанных в настоящих технических характеристиках изделий корпорацией Tektronix прекращена.

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Features & Benefits

  • Standards Supported:
    • M/N (DS1001A/DS1001G)
    • B/G (DS1002)
  • Tuning Range:
    • 55.25 to 801.25 MHz (M/N)
    • 48.25 to 860.25 MHz (B/G)
  • Stereo Sound: BTSC, Dual Tone, NICAM (System Dependent)
  • Zero Carrier Pulse for Depth of Modulation Measurements
  • Standard and User-defined Channel Tables
  • RF Ghost Canceling Processing (DS1001G Only)
  • RS-232/RS-485 I/O Port for Remote Control
  • Simultaneous Left and Right and SAP Audio Output Monitoring
  • Remote Monitoring of RF Input Level
  • Lower Power Dissipation for Increased Efficiency and Reliability
  • Dual Video Outputs
  • IF Inputs and Outputs
  • Front Panel Lock-out Feature

Applications

  • Remote Node Monitoring
  • Operational Demodulation
  • Broadcast Demodulation

The Tektronix DS1000 Series Television Demodulators are the answer for cable operators, broadcasters and manufacturers that need a low-cost, high-performance demodulator. They support television standards M/N and B/G.

The DS1000 Series products are full measurement-grade demodulators, with specifications better than demodulators twice their size. Input sensitivity and other specifications make the DS1000 Series ideal for use as a repeater or as the analog front end of an RF-to-digital conversion system in all-digital cable systems. It can also act as a precision set-top converter for making baseband measurements in the field.

The DS1000 Series products are well suited for remote node monitoring. The addressable serial port allows remote control and status monitoring using computers and modems.

For a complete solution that includes a graphical display, the DS1000 Series can be combined with the 1740A Combination Waveform/Vector Monitor.

Ghost Canceling

The DS1001G incorporates state-of-the-art ghost canceling technology which improves overall video quality by using a specialized ghost canceling test signal, pre-inserted into the television signal by broadcasters, to automatically null out annoying static or dynamic picture "ghosts" caused by RF signal reflections from large buildings, trucks or changing weather conditions.

Audio Support

Audio support includes BTSC stereo for system M/N (DS1001A) as well as both FM (mono & dual tone) and NICAM support for System B/G (DS1002). The DS1001A audio outputs are through special terminal-block connectors, which provide simultaneous outputs of Left, Right and SAP audio channels. The DS1002 audio output is through 2xLR connectors. These connectors can be configured in a variety of ways (depending on system), including: mono, SAP, stereo right and left, both right or both left. The DS1001A also has a 4.5 MHz intercarrier output for driving an external aural modulation monitor.

Remote Programming

The DS1000 Series supports remote programming via either RS-232 or RS-485 at 9600 baud. Most front-panel controls can be accessed via the port.

Characteristics

   

DS1001A/DS1001G (M/N)

DS1002 (B/G)

RF Section

IF Section

Quadrature Video Output

Video Section

Audio Section

RF Tuning Range

55.25 to 801.25 MHz (Under range to 53.75)

48.25 MHz to 860.25 MHz (Under range to 45.25 MHz)

RF Sensitivity*1

0 to +30 dBmV, +60 to +90 dBµV

0 to +30 dBmV, +60 to +90 dBµV

Return Loss

>6 dB

>6 dB

Input Impedance

75 Ω

75 Ω

Input Connector

Female "F"

Female "F"

Channel Tables

User configurable

User configurable

Visual IF Frequency

45.75 MHz

38.9 MHz

Aural IF Frequency

41.25 MHz

33.4/33.16/33.05 MHz depending on sound system

IF Output

+51 dBmV/+111 dBµV (typical), BNC

+51 dBmV/+111 dBµV (typical), BNC

BNC Connector

Yes

Yes

Video Outputs

Two BNC connectors

Two BNC connectors

4.5 MHz Intercarrier Input and Output

Two BNC connectors

None

Video Signal Output

1 Vp-p baseband video (GCR 1 channel only)

1 Vp-p baseband video

Video Signal-to-noise*1

>50 dB (NTC7-weighted)

>50 dB (unified-weighted)

Frequency Response(18°C to 26°C)

±0.7 dB, 100 kHz to 3.58 MHz (typical)

±0.7 dB, 100 kHz to 4.43 MHz

Group DelaySound Trap Off

±50 ns, 100 kHz to 3.58 MHz

±60 ns, 100 kHz to 4.43 MHz

Group Delay Reference Sound Trap On

FCC

Curve B

Differential Gain

<1.5% (<2.5% DS1001G typical)

<1.5%

Differential Phase

<1.5° typical (<2° DS1001G typical)

<1.5° typical

Chroma/Luma Delay

<40 ns

<40 ns

Luminance Bar Amplitude

<2%

<2% typical

Luminance Bar Tilt

<2% (typical 1%)

<3% typical

2T K-factor

<2.5% (typical 1%)

<2.5% typical

Line Time Distortion

<3% typical

<3% typical

Audio Outputs

Terminal-block connectors (simultaneous outputs of Left, Right, SAP)

2 XLR configurable (Auto Switching FM or NICAM, Auto Switching for Mono, Dual Sound & Stereo)

Level

0 dBm across 600 Ω

0 dBm across 600 Ω

Frequency Response

±0.5 dB, 50 Hz to 12 kHz (typical)

±0.5 dB, 50 Hz to 12 kHz (typical)

THD

<1% at 1 kHz*2

<1% at 1 kHz*2

*1 Video signal to noise tested at +19 dBmV/+79 dBµV.

*2 Audio THD tested with a blackburst video signal.

The DS1000 series television demodulator can be part of a total television monitoring system when coupled with a VM700T video measurement set.

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Environmental

Temperature -

Operating: +5°C to +35°C.

Nonoperating: -20°C to +70°C (DS1001A/DS1001G). -20°C to +75°C (DS1002).

Altitude - Operating: 0 to 6,500 ft. (2,000 m).

Nonoperating: 0 to 50,000 ft. (4,572 m).

Safety - Complies with: IEC61010–1, EN61010–1, UL3111–1, CSA1010.1.

Power

Source Power - Voltage Range: 95 to 240 VAC.

Line Frequency: 50/60 Hz.

Power Consumption - 35 W maximum.

Physical Characteristics

Dimensions

mm

in.

Weight

kg

lbs.

Height

46

1.8

Width

206

8.1

Depth

440

17.3

Net

2.2

4.8

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