SDI LNFR-100E Manual do Utilizador descarregar pdf (Página 46)

PULSE GENERATOR, PPS-2

FEATURES

• External sync

• High stability

• Low input VSWR

• Low temperature coefficient: 3 ps/ºC

• 50 ohm output: 2 Vp-p

APPLICATIONS

• Reference clock distribution

• Time synchronization

• 1 PPS generation

DESCRIPTION

The PPS-2 pulse generator is used to generate one pulse per second signals from a sine-wave input signal.

The input can be a 1 MHz, 5 MHz or 10 MHz signal. The pulse-per-second (pps) output has a variable pulse

width. The input frequency selection and pulse width selections are configured via jumper settings. The output

pps can synchronize with an external event. The synchronization is good to +/- ½ of the input clock cycle. The

outputs are designed to drive low impedance loads and long 50 or 75-ohm cables. The channel-to-channel

delay differences are less than 1 ns. The instrument is available in a 3.5” X 8.4” X 12 “ enclosure. The unit

will operate on 110/220 VAC.

SPECIFICATIONS

SpectraDynamics, Inc. ● 1849 Cherry Street Unit 2, Louisville CO, 80027 ● Phone (303) 665 1852 ● Fax (303) 604 6088

www.spectradynamics.com

PARAMETER CONDITIONS MIN TYP MAX UNITS

Rise time 10 - 90 % - 3 4 ns

Fall time 10 - 90 % - 3 4 ns

Differential delay channel - channel - 200 500 ps

Impedance input

output

Ohms

Return loss Input (S11) - -35 -25 dB

High level

Low level

50 ohm load

2.4

0.4

0.5

Input signal level 1 MHz, 5 MHz and 10 MHz -3 +7 +13 dBm

External Sync. error 1 MHz

5 MHz

10 MHz

+/- 500

+/- 100

+/-

Temperature-delay

coefficient

0 - 50 ºC

5 ps/ºC

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 59 60

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SDI LNFR-100E Manual do Utilizador Página 46

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