SDI PD-15RMi-C User manual

PD-15RMi-C
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-15RMi-C Pulse Distribution Amplifier Operating Manual
Copyright © 2021 SpectraDynamics, Inc. All rights reserved.
MODEL: PD-15RMi-C R01-2021/MD-FA

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 Installation ……………………………………………………………….…….. 6
6.0 Operation ……………………………………………………………………… 7
7.0 Troubleshooting ………………………………………………………………. 8
8.0 Specifications …………………………………………………………………. 9
9.0 Warranty and service ………………………………………………………… 10

1.0 Introduction
Page 1
The PD-15RMi-C is a TTL Pulse Distribution Amplifier that provides distribution for one
pulse per second (PPS) signals. The amplifier can also be used to distribute pulses with a
repetition rate up to 100 MHz.
The PD-15RMi-C is designed for maximum flexibility and is housed in a 1U, 19-inch
rackmount enclosure that may contain up to three pulse distribution modules. The table
below shows the available options identified by the part number. Each module provides
five buffered outputs designed to drive low impedance loads and long 50 or 75 ohm
cables. The standard unit is manufactured with 50 ohm input impedance and 10 ohm
output impedance to provide a 4.3 volt peak-to-peak signal into 50 ohm load.
The channel-to-channel delay differences are typically less than 100 ps. The distribution
modules typically have 3 ps/ºC temperature coefficient of propagation delay. The small
propagation delay characteristics and low temperature coefficient of delay are essential
for the distribution of high quality timing signals.
This instrument is designed to be powered by a 100 to 240 VAC mains source or by a +12
to +36 VDC power source. If both AC and DC sources are powering the instrument, the
DC source will be used as backup power in case of AC power outages. 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.
PD-15RMi Options
Part Number Number of
Inputs
Number of
Outputs
AC Voltage
Operation
DC Voltage
Operation
PD-15RMi-A 1 5 √√
PD-15RMi-C 3 15 √√
PD-15RMi-C1 1 10 √√
PD-15RMi-C2 2 10 √√
PD-15RMi-C3 1 15 √√

2.0 Safety and Preparation for Use
Page 2
The PD-15RMi-C was designed for indoor use only and is not intended for operation
outdoors or in a wet environment. The instrument may be mounted in a standard 19-inch
instrumentation rack or may be used on a laboratory bench.
Inspect the instrument and power cords for damage before first use.
2.1 Electrical safety and preparation for use
Voltages capable of causing injury or death are present in this instrument. Use extreme
caution whenever the instrument cover is removed.
Line Voltage
This instrument is designed to operate with a 100 to 240 VAC, 47 to 63 Hz power source.
DC operation with +12 to + 36 VDC, + 2.5 Amperes is also possible.
Fuse
A 1.0 Ampere, 250 V, 5X10 mm slow-blow fuse is used for 100 to 240 VAC operation.
A 2.5 Ampere, 250 V, 5X10 mm slow-blow fuse is used for DC power 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 the instrument.
DC Power
The instrument has a RM12BRD-6PH(71) DC connector on the back panel with 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
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 power
connector and may be connected together at this point.

2.0 Safety and Preparation for Use
Page 3
Requirements for the external DC power supply
The following specifications should be used to ensure optimum performance:
DC Supply voltage +12 to +36 VDC, 2.5 Amps
Line regulation +/-0.05% for a 10% line change
Load regulation +/-0.05% for a 50% load change
Output ripple < 5 mV peak-to-peak
Pin configuration Same as RM12BRD-6PH(71) DC connector on the back panel
Verify that the connector from the DC power supply has the correct pin configuration. Do
not apply AC voltage to the DC power connector. Failure to follow these directions may
cause injury or death to personnel, cause irreparable damage to the instrument and voids
all warranties
2.2 Instrument safety and preparation for use
1 PPS Signals
The 1 PPS signal to be distributed should conform to TTL specifications. Make sure that
only TTL level (0 to 5 V) signals are applied to the 1PPS INPUT Connector. Do not apply
negative voltages as they will damage the pulse distribution amplifier.
Absolute Maximum Ratings:
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 +36 VDC
Storage Temperature -10 to +75 ºC
Operation Environment 0 to +50 ºC

3.0 Front Panel
Page 4
AC Power
The AC Power LED turns on when AC power is applied to the unit.
DC Power
The DC Power LED is on when DC power is applied to the unit.
PPS LEDs
The PD-15RMi-C may contain up to three pulse distribution modules, each module is
monitored by the corresponding PPS LED labeled PPS 1, PPS 2 and PPS 3. All LEDs are
installed on every PD-15RMi-C option. Only PD-15RMi-C options with 3 modules come
with three functioning monitor LEDs. All other PD-15RMi-C options will have a non-working
monitor LED. Please refer to PD-15RMi-C options table on page 1.
PPS LEDs will flash on the falling edge of the 1 PPS output signal from the corresponding
pulse distribution module.

4.0 Back Panel
Page 5
AC Power
The PD-15RMi-C is configured to operate on 100 to 240 VAC.
DC Power
The PD-15RMi-C may also operate on DC power from 12 to 36 VDC as the main power
supply. When the instrument is set up to operate with both AC and DC power sources at
the same time, the DC power is used as backup power in case of AC power outages.
INPUT
The number of available inputs are determined by the PD-15RMi-C part number. 1 PPS
signals or pulses with repetition rate up to 100 MHz may be provided to any SMA
connector labeled INPUT. Input signals must conform to TTL levels. Only the PD-15RMi-C
includes all SMA input connectors as shown on the picture above. Other options are shown
below.
OUTPUTS
The number of available outputs per 1PPS input are determined by the part number below.
Any PD-15RMi-C output may be used to drive the input of another 1PPS distribution
module. All outputs are designed to drive 50-ohm loads.
PD-15RMi-C1
PD-15RMi-C2
PD-15RMi-C3

5.0 Installation
Page 6
The instrument may be mounted in a standard 19-inch instrument rack or may be operated
on a laboratory bench.
Connecting power
The PD-15RMi-C ships with a standard North American, European, or Chinese IEC power
cord and a RM12BPE-6S(81) DC connector.
You may prepare a DC power cable with the DC connector following the connector
configuration on page 2.
Locate the AC POWER entry module on the rear of the enclosure and connect the AC
power cord. If you already prepared the DC power cord you may also connect it to the
instrument.

6.0 Operation
Page 7
To operate the PD-15RMi-C plug the power cord into an appropriate AC power outlet. You
may also connect the DC power cable to an appropriate DC power supply.
Providing DC power to the PD-15RMi-C is optional and is used as backup power in the
event of AC power outages. The instrument is designed to automatically switch from AC to
DC power supply operation using a Schottky diode network and charge storage capacitors
to avoid any glitches and ensure uninterrupted continuous operation.
Once AC power is supplied to the PD-15RMi-C, the LED on the front panel labeled AC
POWER will turn on. If DC power is also applied to the instrument, the monitor LED
labeled DC POWER will light up.
1 PPS Signal Distribution
Attach an SMA cable with the 1PPS signal to be distributed to any of the SMA connectors
label INPUT located on the back panel. The PPS LED located on the front panel will flash
on the falling edge of each output pulse and five buffered outputs will be available at the
SMA connectors labeled 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.

7.0 Troubleshooting
Page 8
Do not attempt to service or adjust the instrument unless another person, capable of
providing first aid or resuscitation, is present.
If there are problems that cannot be resolved by the troubleshooting steps below please
contact technical support.
Technical Support
Tel: [phone] , Fax: [phone]
[email protected], www.spectradynamics.com
AC Power LED does not turn on.
Disconnect the power cords and remove the top cover. Check the main AC power fuse and
power cord. If the fuse is blown replace it with same type and rating. Please contact SDI if
the fuse blows again or if the event that caused the fuse to blow is not known.
DC Power LED does not turn on.
Disconnect the power cords and remove the top cover. Check the main DC power fuse and
power cord. If the fuse is blown replace it with same type and rating. Please contact SDI if
the fuse blows again or if the event that caused the fuse to blow is not known.
PPS LEDs are off.
Make sure that the provided signal to the instrument conforms with TTL levels.
If the input signal is correct and the LED remains off, the instrument will have to be
returned for repair.

8.0 Specifications
Page 9
Specifications are valid for all PD-15RMi-C options: C, C1, C2 and C3.
Rackmount chassis 1U H, 19“ W, 14” D
Unit weight 10 lb
AC Input Voltage Range 90 to 264 VAC, 22 W, 47 to 63 Hz
DC Input Voltage Range +12 to +36 VDC, 8 W
Storage temperature -10 to +75 ºC
Operation environment 0 to +50 ºC
Humidity 5% to 95% Non-condensing
PARAMETER CONDITIONS MIN TYP MAX UNITS
Rise time 10 - 90 % - 0.8 0.9 ns
Fall time 10 - 90 % - 0.8 0.9 ns
Propagation delay 50 ohm load - 7 9 ns
Differential delay Channel - Channel - 100 200 ps
Input High Level
Input Low Level
Input signal into 50 ohm load
Input signal into 50 ohm load
2
-0.7
-
-
5
0.8
V
Frequency range 50% duty cycle 0 100 105 MHz
Temp-delay Coefficient 0 - 50 ºC - 3 5 ps/ºC
Pulse Distribution Amplifiers are manufactured with 50 ohm input impedance and 10 ohm output impedance
Impedance Input
Output
-
-
50
10
-
-
Ohms
Output High Level
Output Low Level
50 ohm load, 10 ohm output
50 ohm load, 10 ohm output
3.6
-
4.3
0.1
5.0
0.2
V
The following specifications are for a Pulse Distribution Amplifier with 50 ohm input and output impedance
To select this option, please add “-Opt 50/50” to your order.
Impedance Input
Output
-
-
50
50
-
-
Ohms
Output High Level
Output Low Level
50 ohm load, 50 ohm output impedance
50 ohm load, 50 ohm output impedance
2.4
-
2.6
0.1
2.8
0.2
V

8.0 Warranty and Service
Page 10
Warranty
The PD-15RMi-C is warranted to be free of defects under normal operating conditions, as
specified, for one year from date of original shipment from SpectraDynamics, Inc. (SDI).
SDI’s obligation and liability under this warranty is expressly limited to repairing or
replacing, 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-15RMi-C is sold by SDI.
SDI makes no other warranty, express or implied, and makes no warranty of the fitness for
any particular purpose. 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 delay. 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 representative of SDI is authorized to change this
warranty in any way or grant any other warranty.
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]
www.spectradynamics.com

EC Declaration of Conformity
The PD-15RMi-C has been designed and manufactured in accordance with the below
referenced standards and complies with all essential requirements of the directives listed
below.
Directives:
2014/35/EU of the European Parliament and of the Council of 26 February 2014 on
the harmonization of the laws of the Member States relating to the making available on the
market of electrical equipment designed for use within certain voltage limits.
2014/30/EU The Electromagnetic Compatibility Directive and its amending directives.
2011/65/EU of the European Parliament and of the Council of 8 June 2011 on the
restriction of the use of certain hazardous substances in electrical and electronic
equipment.
Standards:
EN 55011 2009 + A1: 2010, Product family standard for Industrial, Scientific and
Medical (ISM) equipment.
EN 61010-1:2010 Safety Requirements for Electrical Equipment for Measurement,
Control and Laboratory Use – Part 1: General Requirements
EN 61326-1:2013 Electrical Requirements for Electrical Equipment for Measurement,
Control and Laboratory Use – Part 1: General Requirements
Page 11