Spartan 821/721 Manual Instrument Hardware Specifications A-13
A.1.5 Microphone Model 375A04 Filter Response and Corrections
Frequency responses and correction filters for the Model 375A04 microphone are the same as those for the Model
377B02 microphone shown in A.1.4 Microphone Model 377B02 Filter Response and Corrections
.
A.1.6 Hardware Interface Specifications
A.1.7 USB Client Interface Specifications
A.1.8 Bluetooth™ Low Energy Interface
Status Indicator
Tri-color LED Status Light blinks approximately every two seconds when
enabled:
Green = Measurement Running
Yellow = Paused
White = Stopped
Red = Power button pressed
LED Status Light may be disabled. See section 5.3 Troubleshooting the 721 or
821
Display
TFT display: 4.3-inch, 480 x 800 RGB;
Updates once per second
Screen Lock
Interface may be locked and unlocked. See section 5.1 Utilizing the Meter
Lock
Languages English, French, Italian, Spanish, Portuguese
Client Interface Type USB 2.0 High–Speed, Type-C connector
Power Draw ≤ 2 A from PC, USB Hub, or portable power supply (PSA045)
Supported Hosts
PC with G4 LD Utility software
PC with custom software using SWW-G4-SDK or SWW-G4-WIN
Interface Type BLE 4.1
Supported Hosts
Android™
1
and iOS™ devices via LD Atlas app;
PC via G4 LD Utility software
1. The Bluetooth wordmark is a registered trademark of Bluetooth SIG, Inc. in the United States and in other
countries. Android is a registered trademark of Google, LLC. in the U.S. and in other countries. IOS is a registered
trademark of Cisco Systems and licensed to Apple, Inc. in the U.S. and in other countries.
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