N4L - 20 YEARS OF LEADERSHIP IN POWER METROLOGY

SLM3505 Selective Level Meter

Portable Selective Level Meter with integrated Signal Generator

Field Portable Power Line Communications Analysis instrument featuring colour display and USB memory stick interface for data transfer. The N4L SLM3505 also includes VSWR, Oscilloscope and impedance(LCR) modes.

The SLM3505 was designed to provide a single instrument solution for the Electric Utility System Protection Engineer and Relay/Communications Technician responsible for the alignment and maintenance of Power Line Carrier, Audio Tone and FSK Communications Systems. This multifunction instrument replaces all 4 existing Power Line Carrier Instruments in one for a fraction of the cost, all in a compact lightweight package. It is important to note that the requirement for a separate signal generator is no longer the case, the SLM3505 integrates the signal generator into the same chassis as the selective level meter.

Product Images

Features & Benefits

Frequency range 5Hz to 5MHz Selectable inputs up to 300 Vpk
Low and High level generators Dual frequency SLM mode
Impedance analyzer VSWR Meter
Oscilloscope mode Line trap/tuner test
Mains / 12 volt dc / internal battery operation Supplied complete with rugged flight case

Brochures                                               

SLM3505 Brochure & Technical Specification PDF, 360Kb
SLM3505-E Brochure & Technical Specification PDF, 360Kb

Documentation                                               

 

SLM3505 User Manual PDF, 2.48MB
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SLM3505 Comms Manual PDF, 594kB

SLM3505 Options, Software, Accessories + Application Notes and Related Articles

COMMS_ICON Communications Interfaces:
  • Standard: RS232, USB, LAN
PROBE_ICON Connection Leads and Accessory Options:
  • SLM Custom Cable Set – 2x BNC to Alligator Clip 2m, 2x BNC to Pin Tip 2m, 2x BNC to BNC 2m, 3x 4mm Plug to Pin Tip 2m, 3x 4mm Plug to Alligator 2m
INJ_TRANSFORMER_ICON Direction Coupler Options
EXTENSION_ICON Port Accessory Options:
  • USB to 9 Pin RS232 Serial Converter
CASES_ICON Carry Cases:
CALIBRATION_ICON Calibration and Documentation (Unit supplied with UKAS ISO17025 certificate as standard when new):
  • Standard Recalibration (ISO17025 Traceable) – SLM3505
  • Spare set of user manuals – Hard copy of user and communications manual
PC_ICON PC Software (Free of charge):
  • CommView 2 Scripting Software – SLM PC Scripting Software

 

Below are a list of application notes related to the field of power line carrier communications (PLCC)

APP004 – Testing FSK Communications

SLM3505 Full Instrument Specification

MEASUREMENT SPECIFICATIONS 
Selective Level Meter
Frequency Range5Hz to 5MHz
Frequency Accuracy±5ppm over all temperature range
High Accuracy
"Option F"
< ±2ppm over all temperature range
Magnitude Accuracy < 1KHz: 0.05% rng + 0.05% rdg + 50μV

< 10KHz: 0.05% rng + 0.05% rdg + 0.01%/kHz +50μV

< 5MHz: 0.05% rng + 0.25% rdg + 0.001%/kHz +50μV


Inputs (Unbalanced)
Type & Connection
Differentially Isolated & Isolated BNC
Bandwidth Settings3, 25, 100, 1.95k,
3.1k HZ & Wideband
Measurement UnitsV
dBm
dBu
dB0 (Traditionally referred to as dB in PLCC applications)
Accuracy of Level Measurement at 0 dBm
±0.3dB(m)
High Voltage Input
Max Input±300V peak
Input Impedance1MΩ ±5% // 30pF
50Ω Input
Max Input10W (22Vrms)
Input Impedance50Ω ±5% // 30pF
75Ω Input
Max Input10W (28Vrms)
Input Impedance75Ω ±1% // 30pF
Low Level Input
Max Input±10V peak
Input Impedance50Ω ±1% // 30pF
75Ω ±1% // 30pF
600Ω ±1% // 30pF
1MΩ ±1% // 30pF
Input Balanced
Max Input±10V peak
Input Impedance50Ω ±1% // 30pF
75Ω ±1% // 30pF
600Ω ±1% // 30pF
1MΩ ±1% // 30pF
Input TypeDifferential
Input Connection3 x 4mm connectors: Positive, Negative & Ground
Signal Generator
Generator TypeDirect Digital Synthesis (DDS), single frequency or sweep
Generator WaveformsSinewave, Square, Triangle, White Noise
Frequency Accuracy5ppm over all temperature range
High Accuracy
"Option F"
< ±2ppm over all temperature range
Magnitude Accuracy± 1% ± 1%/MHz (Low Level Output)

± 2.5% ± 1%/MHz (High Level Output)
Frequency Setting1Hz or better up to 999.999Hz
10Hz > 1MHz
Resolution6 Digits
Output Level Range for
0dB(m)
Selectable in 0.001dB(m) steps between:
Low Output
-40dB(m) to +24dB(m)
High Output
-7dB(m) to +35dB(m)
Hi Level Output
Frequency Range10kHz to 5MHz
Output Level2W into 50Ω (10V rms)
Output Impedance50Ω ±2%
75Ω ±2% (Option)
Lo Level Output
Frequency Range5Hz to 5MHz
Output Level5Vrms into high impedance
Output Impedance50Ω ±2% +24dBm
75Ω ±2% +22dBm
600Ω ±2% +15dBm
Frequency Shift Delay Timer0 to 1s (1ms steps)
Impedance Analyzer
Impedance Range100 milli Ohm to 100 Kilo Ohm
Accuracy < 10KHz: 1% rdg

< 1MHz: 1% rdg + 0.005%/KHz +50μV

< 5MHz: 5% rdg + 0.002%/KHz +50μV
FeaturesLCR Measurements (Inductance, Capacitance, Resistance, tan delta, QF)
Lead Compensation (zero lead function)
Impedance versus Frequency Curve
Oscilloscope
Sample Rate5M samples/s
Timebase5μs/div to 5s/div
TriggerAuto, Normal or Single Shot
PretriggerNone, 25%, 50%, 75%
Input RangesAs Selective Level Meter
Second Input±10V peak
1MΩ ±5% // 30pF
VSWR Meter
Accuracy1% of reading up to 1MHz.
5% of reading above 1MHz to 5MHz for power measurements (forward and reflected) at VSWR = 3
FeaturesForward Power, Reflected Power, % Reflected Power, & Frequency under test visible on one screen
Frequency Response Analyzer
Frequency range5Hz to 5MHz
Gain Accuracy dB0.02dB < 1KHz
0.05dB < 10KHz
0.1dB + 0.001dB/KHz
Phase Accuracy ⁰0.02⁰ < 10KHz
0.02⁰ + 0.003⁰ / KHz
General Specifications
Sweep StepsUp to 2000 in all sweep functions
Set Up and Data StorageUp to 1000 analyser setups, readings and sweep results can be stored
InterfaceUSB, RS232, LAN
Real Time ClockTime and date stamp for data stores
Data StorageInternal 1GB flash, External USB pen port
Display Type5.7" 1/4 VGA colour, high brightness backlight
Display resolution6 digit frequency, 5 digit voltage, 4 digit dBm
SizeApprox: 305 x 230 x 45mm "tablet" style
Weight2.3Kg
Power Source9-18V @ 3A AC adapter or 12V dc from car or external batteries
Battery type and Battery Life10 x AA size NiMH
Minimum 4 hours
Temperature Range-5 to +50⁰ C

SLM3505-E Full Instrument Specification

MEASUREMENT SPECIFICATIONS 
Selective Level Meter
Frequency Range5Hz to 5MHz
Frequency Accuracy±5ppm over all temperature range
High Accuracy
"Option F"
< ±2ppm over all temperature range
Magnitude Accuracy < 1KHz: 0.05% rng + 0.05% rdg + 50μV

< 10KHz: 0.05% rng + 0.05% rdg + 0.01%/kHz +50μV

< 5MHz: 0.05% rng + 0.25% rdg + 0.001%/kHz +50μV


Inputs (Unbalanced)
Type & Connection
Differentially Isolated & Isolated BNC
Bandwidth Settings3, 25, 100, 360, 400, 1.95k, 3.1kHZ & Wideband
Measurement UnitsV
dBm
dBu
dB0 (Traditionally referred to as dB in PLCC applications)
Accuracy of Level Measurement at 0 dBm
±0.3dB(m)
High Voltage Input
Max Input±300V peak
Input Impedance1MΩ ±5% // 30pF
75Ω Input
Max Input10W (28Vrms)
Input Impedance75Ω ±1% // 30pF
Low Level Input
Max Input±10V peak
Input Impedance75Ω ±1% // 30pF
120Ω ±1% // 30pF
150Ω ±1% // 30pF
600Ω ±1% // 30pF
1MΩ ±1% // 30pF
Input Balanced
Max Input±10V peak
Input Impedance75Ω ±1% // 30pF
120Ω ±1% // 30pF
150Ω ±1% // 30pF
600Ω ±1% // 30pF
1MΩ ±1% // 30pF
Input TypeDifferential
Input Connection3 x 4mm connectors: Positive, Negative & Ground
Signal Generator
Generator TypeDirect Digital Synthesis (DDS), single frequency or sweep
Generator WaveformsSinewave, Square, Triangle, White Noise
Frequency Accuracy5ppm over all temperature range
High Accuracy
"Option F"
< ±2ppm over all temperature range
Magnitude Accuracy± 1% ± 1%/MHz (Low Level Output)

± 2.5% ± 1%/MHz (High Level Output)
Frequency Setting1Hz or better up to 999.999Hz
10Hz > 1MHz
Resolution6 Digits
Output Level Range for
0dB(m)
Selectable in 0.001dB(m) steps between:
Low Output
-40dB(m) to +24dB(m)
High Output
-7dB(m) to +35dB(m)
Hi Level Output
Frequency Range10kHz to 5MHz
Output Level2W into 75Ω (10V rms)
Output Impedance75Ω ±2%
Lo Level Output
Frequency Range5Hz to 5MHz
Output Level5Vrms into high impedance
Output Impedance75Ω ±2% +22dBm
120Ω ±2% +20dBm
150Ω ±2% +19dBm
600Ω ±2% +15dBm
Frequency Shift Delay Timer0 to 1s (1ms steps)
Impedance Analyzer
Impedance Range100 milli Ohm to 100 Kilo Ohm
Accuracy < 10KHz: 1% rdg

< 1MHz: 1% rdg + 0.005%/KHz +50μV

< 5MHz: 5% rdg + 0.002%/KHz +50μV
FeaturesLCR Measurements (Inductance, Capacitance, Resistance, tan delta, QF)
Lead Compensation (zero lead function)
Impedance versus Frequency Curve
Oscilloscope
Sample Rate5M samples/s
Timebase5μs/div to 5s/div
TriggerAuto, Normal or Single Shot
PretriggerNone, 25%, 50%, 75%
Input RangesAs Selective Level Meter
Second Input±10V peak
1MΩ ±5% // 30pF
VSWR Meter
Accuracy1% of reading up to 1MHz.
5% of reading above 1MHz to 5MHz for power measurements (forward and reflected) at VSWR = 3
FeaturesForward Power, Reflected Power, % Reflected Power, & Frequency under test visible on one screen
Frequency Response Analyzer
Frequency range5Hz to 5MHz
Gain Accuracy dB0.02dB < 1KHz
0.05dB < 10KHz
0.1dB + 0.001dB/KHz
Phase Accuracy ⁰0.02⁰ < 10KHz
0.02⁰ + 0.003⁰ / KHz
General Specifications
Sweep StepsUp to 2000 in all sweep functions
Set Up and Data StorageUp to 1000 analyser setups, readings and sweep results can be stored
InterfaceUSB, RS232, LAN
Real Time ClockTime and date stamp for data stores
Data StorageInternal 1GB flash, External USB pen port
Display Type5.7" 1/4 VGA colour, high brightness backlight
Display resolution6 digit frequency, 5 digit voltage, 4 digit dBm
SizeApprox: 305 x 230 x 45mm "tablet" style
Weight2.3Kg
Power Source9-18V @ 3A AC adapter or 12V dc from car or external batteries
Battery type and Battery Life10 x AA size NiMH
Minimum 4 Hours
Temperature Range-5 to +50⁰ C

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