PPM Optical Isolators

Brand: PPM
Origin: United Kingdom

Fiber-optic measurement links are selected separately for AC and DC coupling.

Key specification options

Operating frequency: G series: 40Hz to 250MHz / K series: 2kHz to 1.35GHz / P series: 1MHz to 2GHz / S series: 10MHz to 3GHz
Gain flatness (typical): G series: ±0.5dB(100Hz-250MHz) / K series: ±0.5dB(10kHz-1.35GHz) / P series: ±0.5dB / S series: ±0.75dB
Gain flatness (maximum): G series: ±3dB / K series: ±3dB / P series: ±1.5dB / S series: ±1.5dB
Phase flatness: G series: >100Hz:±20° / K series: >5kHz:±20° / P series: ±20°(typ.±5°for 1MHz to 1.5GHz) / S series: ±20°(typ.±5°for 1MHz to 1.5GHz)
Rise time: G series: <1.4nS / K series: <350pS / P series: <250pS / S series: <200pS
Noise figure: G series: <24dB(22dB)@ 100MHz / K series: <25dB(22dB)@ 500MHz / P series: <25dB(24dB)@ 500MHz,<30dB @2GHz / S series: <26dB(24dB)@ 500MHz,<30dB @3GHz

Measurement and application

An optical measurement link includes a transmitter, fibre connection and receiver. Selection should cover the complete path as well as the locations of the measurement point and receiving equipment.

Selection and connections

Confirm signal type, channel arrangement and coupling method, and identify the equipment at both ends. Check the transmitter, receiver, fibre and power supply combination against the product instructions.

Models & specifications

PPM Optical Isolators

AC-coupled link

PPM Optical Isolators / AC-coupled link
Coupling link	G series	K series	P series	S series
Operating frequency	40Hz to 250MHz	2kHz to 1.35GHz	1MHz to 2GHz	10MHz to 3GHz
Gain flatness (typical)	±0.5dB(100Hz-250MHz)	±0.5dB(10kHz-1.35GHz)	±0.5dB	±0.75dB
Gain flatness (maximum)	±3dB	±3dB	±1.5dB	±1.5dB
Phase flatness	>100Hz:±20°	>5kHz:±20°	±20°(typ.±5°for 1MHz to 1.5GHz)	±20°(typ.±5°for 1MHz to 1.5GHz)
Rise time	<1.4nS	<350pS	<250pS	<200pS
Noise figure	<24dB(22dB)@ 100MHz	<25dB(22dB)@ 500MHz	<25dB(24dB)@ 500MHz,<30dB @2GHz	<26dB(24dB)@ 500MHz,<30dB @3GHz
Signal delay	10nS	10nS	10nS	10nS
Transmitter input impedance
Receiver output impedance
Input P1db	>0dBm @100MHz	>0dBm @500MHz	>0dBm @500MHz	>0dBm @500MHz
Input IP3	>10dBm@ 100MHz	>10dBm @500MHz	>10dBm @500MHz	>10dBm @500MHz
Signal inversion	Inversion	Inversion	Inversion	Inversion
Operating temperature	-10 to+40°C	-10 to+40°C	-10 to+40°C	-10 to+40°C
Fiber length	<1m to~4km	<1m to~4km	<1m to~4km	<1m to~4km
Optical link budget	-3dB will turn status LED red/green on RX module,-10dB will turn status LED red on RX module	-3dB will turn status LED red/green on RX module,-10dB will turn status LED red on RX module	-3dB will turn status LED red/green on RX module,-10dB will turn status LED red on RX module	-3dB will turn status LED red/green on RX module,-10dB will turn status LED red on RX module
Electrical interface type
Optical interface type	Singlemode:FC/APC Narrow Key	Singlemode:FC/APC Narrow Key	Singlemode:FC/APC Narrow Key	Singlemode:FC/APC Narrow Key
Current consumption @12V	<250mA for Transmitter Module,<150mA for Receiver Module	<250mA for Transmitter Module,<150mA for Receiver Module	<250mA for Transmitter Module,<150mA for Receiver Module	<250mA for Transmitter Module,<150mA for Receiver Module
Front-panel indicators: transmitter module	Power supply status & transmitter active	Power supply status & transmitter active	Power supply status & transmitter active	Power supply status & transmitter active
Front-panel indicators: receiver module	Power supply status & received light level	Power supply status & received light level	Power supply status & received light level	Power supply status & received light level

DC-coupled link

PPM Optical Isolators / DC-coupled link
Coupling link	2.5 MHz	20 MHz	40 MHz
Operating frequency	0Hz-2.5MHz	0Hz-20MHz	0Hz-40MHz
Gain flatness	+/-0.5dB to 1MHz	+/-0.25dB to 2MHz	+/-0.25dB to 10MHz
Gain flatness	+/-1dB to 2MHz	+/-1dB to 15MHz	+/-1dB to 30MHz
Gain flatness	+/-3dB to 2.5MHz	+/-3dB to 20MHz	+/-3dB to 40MHz
Phase flatness	<±10°	<±10°	<±10°
Rise time	<135ns	<20.5ns	<10.3ns
...For+/-2V output	0.3mV(0.02%FS)	0.8mV(0.06%FS)	0.7mV(0.05%FS)
...For+/-10V output	1.5mV(0.02%FS)	N/A	N/A
Signal delay (1M fibre)	350ns	280ns	210ns
Transmitter input impedance	1MΩ/25pF typ.	1MΩ/25pF typ.	1MΩ/25pF typ.
Receiver output impedance	50Ω@±2V standard	50Ω@±2V standard	50Ω@±2V standard
Receiver output impedance	300Ω@±10V optional(2.5MHz limited)	300Ω@±10V optional(2.5MHz limited)	300Ω@±10V optional(2.5MHz limited)
Output DC offset (worst case over the full output range)	<0.3%of FSD	<0.3%of FSD	<0.3%of FSD
Nonlinearity	0.1%of FSD	0.1%of FSD	0.06%of FSD
Operating temperature	-20 to+60°C	-20 to+60°C	-20 to+60°C
Fiber length (single-mode)	<1m to 10km	<1m to 10km	<1m to 10km
Electrical interface type	BNC 50Ω	BNC 50Ω	BNC 50Ω
Optical interface type	Singlemode:FC/APC	Singlemode:FC/APC	Singlemode:FC/APC
Current consumption @12V: TX	<240mA	<240mA	<210mA
Current consumption @12V: RX	<350mA	<315mA	<280mA
Front-panel indicators: transmitter module	Power supply status & ADC overflow	Power supply status & ADC overflow	Power supply status & ADC overflow
Front-panel indicators: receiver module	Power supply status & link lock status	Power supply status & link lock status	Power supply status & link lock status