SDI PD-100i User manual

PD-100i
PULSE DISTRIBUTION AMPLIFIER
OPERATING MANUAL
SPECTRADYNAMICS, INC • 1849 Cherry St. Unit 2. • Louisville, CO 80027
Phone: [phone] • Fax: [phone]
www.spectradynamics.com
SPECTRADYNAMICS, INC

PD-100i Pulse Distribution Amplifier Operating Manual
Copyright © 2018 SpectraDynamics, Inc. All rights reserved.
PD-100i:R02-2018/LA

Contents
1.0 Introduction …………………………………………………………………….... 1
2.0 Safety and preparation for use ………………………………..……….…….. 2
2.1 Electrical ……………….…………………………………………….……. 2
2.2 Instrument ……..…………….………………………………….….…….. 3
3.0 Front panel description …….…………………………………………….…… 4
4.0 Back panel description ………………………………………………….……. 5
5.0 Operation ……………………………………………………………………… 6
6.0 Specifications …………………………………………………………………. 7
7.0 Warranty and service ………………………………………………………… 8

Description
Page 1
The PD-100i is a high speed pulse signal distribution amplifier that provides distribution
for 1 PPS signals and RF signals with a frequency range of 1 to 100 MHz.
The first module receives a 1PPS signal and supplies six buffered outputs designed to
drive low impedance loads and long 50 or 75 ohm cables. The outputs provide a 3.7
volt peak-to-peak signal into a 50 ohm load. The channel-to-channel delay differences are
less than 200ps. The distribution module has the low temperature coefficient of propaga-
tion delay that is essential for the distribution of high quality timing signals.
The second module of the instrument receives a 1-100 MHz signal and provides six buff-
ered square wave outputs. The input to this module does not have to be TTL level logic,
the input may be a sinewave or any other signal that needs to be converted to a square
wave. The typical cross-channel isolation on the RF distribution modules is 100 dB and
reverse isolation is typically greater than 110 dB. The phase noise of the modules is ex-
ceptionally low, typically –148 dBc/Hz @ Fourier frequency of 1 Hz and –170 dBc/Hz @
Fourier frequencies greater than 10 kHz. All outputs are DC coupled and conform to TTL
specifications.
The PD-100i is designed to be powered by a 100 to 240 VAC mains source or by a +12 to
+36 VDC power source if the instrument was acquired with the DC power option. The
DC power module may be used as a main power source for the instrument or in conjunc-
tion with the AC power module as a backup power supply in case of loss of the main
AC power. The instrument is designed to automatically switch from AC to DC supply
operation using a Schottky diode network and charge storage capacitors to avoid any
glitches and ensure uninterrupted continuous operation.
The requirements for the external DC power supply are +12 to +36 VDC at 2 Amperes.
The following specifications should be used to ensure the optimum performance for your
PD-100i:
DC Supply voltage +12 to +36 VDC, 2 Amps
Line regulation +/- 0.05% for a 10% line change
Load regulation +/- 0.05% for a 50% load change
Output ripple < 5mV peak-to-peak

Electrical Safety and Preparation for Use
Page 2
Voltages capable of causing injury or death are present in this instrument.
Use extreme caution whenever the instrument cover is removed. This instrument
was designed for indoor use only.
Line Voltage
This instrument is designed to operate with a 100 to 240 VAC, 47 to 63 Hz power source.
Optional DC operation with +12 to +36 VDC, + 2 Amperes is also possible.
Fuse
A 1.0 Ampere 250V slow-blow fuse is used for 100-240 VAC operation.
A 2.0 Ampere 250V slow-blow fuse is used for +12 to +36 VDC operation.
Only replace fuses with the same type and specifications.
AC Power
The instrument has a detachable three wire power cord for connection to a grounded AC
power source. The enclosure of the unit is directly connected to the outlet ground to protect
against electrical shock. Always use an outlet with a protective ground and do not disable
this safety mechanism. Detaching the AC power cord is the only option of disconnecting
the unit from the AC mains supply. Make sure you have access to the rear panel or provide
an external accessible AC disconnect means for your PD-100i.
DC Power
If the instrument was acquired with the DC power module, the DC connector on the back
panel has the following configuration:
Pin 1 NC
Pin 2 NC
Pin 3 NC
Pin 4 +12 to +36 VDC power return
Pin 5 +12 to +36 VDC power
Pin 6 Chassis GND /Earth GND
Verify that the connector from your DC power supply has the pin configuration mentioned
above. Do not apply AC voltage to the DC power connector. Failure to follow these direc-
tions may cause injury or death to personnel, cause irreparable damage to the instrument
and voids all warranties.
Please note that the power return (pin 4) is NOT connected to the instrument case ground
internally, however both ground connections pin 4) and pin 6) are available at the DC

Instrument Safety and Preparation for Use
Page 3
1 PPS Signals
The 1 PPS signal to be distributed should conform to TTL specifications. Make sure you
Only apply TTL level (0-5V) signals to the 1PPS INPUT Connector.
Do not apply negative voltages as they will damage the pulse distribution amplifier.
RF Signals
The second module of the PD-100i is designed to distribute RF signals. The recommended
input levels are +7 to +20 dBm. Greater power levels will damage the unit and void all war-
ranties. The RF outputs of the PD-100i are DC coupled.
Absolute Maximum Ratings
Input RF Power +20dBm Maximum
Reverse RF Power +20dBm Maximum
Voltage at the RF Input +5 V Maximum
Voltage at the RF Output +5 V Maximum
Voltage at 1 PPS input -0.7 VDC to +5.5 VDC
Reverse Voltage at 1 PPS output -0.7 VDC to +5.5 VDC
DC Supply Voltage + 40VDC
Storage Temperature -10 to +75 ºC
Operation Environment 0 to +50 ºC

Front Panel
Page 4
AC
The AC Power LED turns on when AC power is applied to unit.
DC
The DC Power LED is on when DC power is applied to unit.
1PPS
The 1PPS LED flashes on the falling edge of the 1PPS output signal.
CLOCK
The CLOCK LED will be on if an RF signal is present at the CLOCK input.
1PPS OUTPUTS
The pulse distribution module outputs are designed to drive a 50-ohm load.
CLOCK OUTPUTS
Six buffered square wave signals will be provided at the SMA connectors labeled CLOCK
OUTPUTS.

Back Panel
Page 5
AC POWER
The PD-100i is configured to operate on 100 to 240 VAC.
DC POWER
Optional Battery Backup Connector for DC Backup power source.
1PPS IN
The 1 PPS signal to be distributed should be connected to the SMA jack labeled 1 PPS
INPUT. The pulse must conform to TTL levels.
CLOCK IN
A 1-100 MHz, +13 dBm signal should be connected to the SMA jack labeled INPUT.

Operation
Page 6
To operate the PD-100i locate the AC POWER entry module on the rear of the enclosure
and/or the DC POWER connector and connect the desired power cord(s). Plug the unit in-
to an appropriate power outlet. If you supply AC power to the unit, the LED on the front
panel labeled AC Power will turn on. If you apply DC power to the PD-100i the DC power
LED located on the front panel should light up.
1 PPS Clock Signal Distribution
Attach a cable with the signal to be distributed to the SMA connector on the rear panel la-
beled 1PPS INPUT. The 1PPS LED on the front panel will flash on the falling edge of each
output pulse and six buffered outputs will be available at the front panel SMA connectors
labeled 1PPS OUTPUTS.
Although the device was designed to distribute precision one pulse per second signals, it
may be used to distribute pulses up to a frequency of 100 MHz. The propagation delay is
typically 7 ns, and the channel-to-channel delay difference is less than 200 ps.
RF Clock Signal Distribution
Attach a 1-100 MHz +13 dBm signal to the back panel connector labeled INPUT. The
CLOCK LED on the front panel will turn on and the buffered square wave outputs will be
available on the front panel.

Specifications
Page 7
PPS Distribution Module
CLOCK DISTRIBUTION Module
All tests done at 10 MHz and +13 dBm input unless otherwise specified.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Level 713 20 dBm
Bandwidth -1-100 -MHz
Impedance output -9-Ohms
Rise Time +13 dBm -0.9 1ns
Fall Time +13 dBm -0.9 1ns
Isolation output to output 115 120 -dB
Phase Noise
(Referred to the
Input)
1 Hz
10 Hz
100 Hz
>10 kHz
-
-
-
-
-148
-163
-168
-170
-145
-160
-165
-167
dBc/Hz
Temperature-delay
Coefficient
0 - 50 ºC - 3 - ps/ºC
PARAMETER CONDITIONS MIN TYP MAX UNITS
Rise time 10 - 90 % -0.9 1ns
Fall time 10 - 90 % -0.9 1ns
Propagation delay 50 ohm load -78ns
Differential delay Channel - Channel -100 200 ps
Impedance input
output
-
-
50
9
-
-
Ohms
Input High Level
Input Low Level
Input signal into 50 ohm
load
Input signal into 50 ohm
load
3.7
0
3.8
-
5
0.8
V
Output High Level
Output Low Level
50 ohm load
50 ohm load
3.7
-
3.8
0.4
5
0.5
V
Temperature-delay
Coefficient
0 - 50 ºC - 3 5 ps/ºC

Page 8
Warranty and Service
Warranty
The PD-100i is warranted to be free of defects under normal operating conditions,
as specified, for one year from date of shipment from SpectraDynamics, Inc (SDI). SDI’s
obligation and liability under this warranty is expressly limited to repairing or replac-
ing, at SDI’s option, any product not meeting the said specifications. This warranty shall
be in effect for one (1) year from the date a PD-100i is sold by SDI. SDI makes no other
warranty, express or implied, and makes no warranty of the fitness for any particular pur-
pose. SDI’s obligation under this warranty shall not include any transportation charges or
costs of installation or any liability for direct, indirect, or consequential damages or de-
lay. Any improper use, operation beyond capacity, substitution of parts not approved by
SDI, or any alteration or repair by others in such manner as in SDI’s reasonable judgement
affects the product materially and adversely shall void this warranty. No employee or rep-
resentative of SDI is authorized to change this warranty in any way or grant any other war-
ranty.
Service
Do not attempt to service or adjust the instrument unless another person, capable of
providing first aid or resuscitation, is present. Please remember that any alteration or repair
may void the warranty. Contact SDI with any questions or to request an RMA if a repair is
needed.
SpectraDynamics, Inc.
1849 Cherry Street Unit 2.
Louisville, CO 80027
USA
Tel: [phone]
Fax: [phone]
[email protected]m
www.spectradynamics.com