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This Supplemental/Bid Bulletin is issued to clarify or amend some provisions originally indicated in
the Bidding Documents, in compliance with Section 22.5.2 of the Revised Implementing Rules and
Regulations of Republic Act 9184, to wit:

Issue/Clarification

(ORIGINAL)

Response

(AMENDED, see capitalization and underlined words)

Section VII. Technical Specifications

 Lot No. Qty Unit of Issue Item Description
 2  1 set  earpiece, batteries,
charger, 6 units
6-Person wireless Intercom
System
Mini Duplex Transceiver Base for
1 Plug-In & up to 8 Wireless
Headsets
Standard DECT 6.0
Frequency 1920 to 1930 MHz
Connector 2.5 / 3.5 mm plug-in
Channel Bandwidth 1.728 GHz
Modulation Type GFSK
Transmission Speed 1.152 Mbps
(baud rate)
Duplex Mode Time Division
Duplex (TDD)
Encoding Speech Encoding
ADPCM / 32 bit/s
RF RF Accessing
Time Division Multiple Access
(TDMA)
Range 0.25 mile / 400 m in open
space
Power Supply Headset Power
Supply
Rechargeable lithium 3.7 V / 800
mAh, 3.0 Wh
Charger Power Supply
AC / Adapter: Input 100 to 240
VAC
Charge time: approximately 3
hours
Operation time: approximately 4
hours
Storage Temperature 14 to
140°F / -10 to 60°C
Single-Ear Remote Headset with
Rechargeable Lithium Battery
Headphone
Wireless Connectivity
RF Bandwidth 1.728 GHz
Wireless Modulation: GFSK
DECT Standard: 6.0
Duplex Mode Time-Division
Duplex (TDD)
RF Channel Access Method
Time-Division Multiple Access
(TDMA)
Speech Encoding ADPCM / 32
bps
Transmission Speed 1.15 Mbps
Wireless Range 1312' / 400 m
Frequency 1920 to 1930 MHz
Battery Chemistry Lithium-Ion
Battery Capacity (mAh) 800 mAh
Runtime approximately 6 Hours
DC Input Power 5 VDC at 1000
mA
Storage Temperature 14 to
140°F / -10 to 60°C
8-Bay Multi-Port Charging Base
Specs
Charge Time Approximately
three hours
Input Power 100 to 240 VAC 
 8 unit   

Microphone for Lecturers

Specifications
Transducer Type : Dynamic
Polar Pattern: Cardioid
Frequency Response from: 50 Hz
Frequency Response to: 15 KHz
Sensitivity (dBV/Pa): -54.5 dBV/Pa
Sensitivity (mV/Pa): 1.88 mV/Pa

Section VII. Technical Specifications

 Lot No. Qty Unit of Issue Item Description
set  Long Range Comm. Set (Digital
2-Way Radio) WITH APPLICABLE
NTC LICENSE
with earpiece, batteries,
charger, 6 units
6-Person wireless Intercom
System
Mini Duplex Transceiver Base for
1 Plug-In & up to 8 Wireless
Headsets
Standard DECT 6.0
Frequency 1920 to 1930 MHz
Connector 2.5 / 3.5 mm plug-in
Channel Bandwidth 1.728 GHz
Modulation Type GFSK
Transmission Speed 1.152 Mbps
(baud rate)
Duplex Mode Time Division
Duplex (TDD)
Encoding Speech Encoding
ADPCM / 32 bit/s
RF RF Accessing
Time Division Multiple Access
(TDMA)
Range 0.25 mile / 400 m in open
space
Power Supply Headset Power
Supply
Rechargeable lithium 3.7 V / 800
mAh, 3.0 Wh
Charger Power Supply
AC / Adapter: Input 100 to 240
VAC
Charge time: approximately 3
hours
Operation time: approximately 4
hours
Storage Temperature 14 to
140°F / -10 to 60°C
Single-Ear Remote Headset with
Rechargeable Lithium Battery
Headphone
Wireless Connectivity
RF Bandwidth 1.728 GHz
Wireless Modulation: GFSK
DECT Standard: 6.0
Duplex Mode Time-Division
Duplex (TDD)
RF Channel Access Method
Time-Division Multiple Access
(TDMA)
Speech Encoding ADPCM / 32
bps
Transmission Speed 1.15 Mbps
Wireless Range 1312' / 400 m
Frequency 1920 to 1930 MHz
Battery Chemistry Lithium-Ion
Battery Capacity (mAh) 800 mAh
Runtime approximately 6 Hours
DC Input Power 5 VDC at 1000
mA
Storage Temperature 14 to
140°F / -10 to 60°C
8-Bay Multi-Port Charging Base
Specs
Charge Time Approximately
three hours
Input Power 100 to 240 VAC 
 8  9 unit   

WIRED Microphone for Lecturers

Specifications
Transducer Type : Dynamic
Polar Pattern: Cardioid
Frequency Response from: 50 Hz
Frequency Response to: 15 KHz
Sensitivity (dBV/Pa): -54.5 dBV/Pa
Sensitivity (mV/Pa): 1.88 mV/Pa

 

 Activities Schedule  Time
 Deadline of Submission of Bids  November 16, 2022  2:00pm
 Opening of Bids   November 16, 2022  2:00pm

 This shall form an integral part of the bidding documents. Any provisions in the Bidding Documents inconsistent herewith is hereby cancelled, modified, and superseded accordingly.

For guidance and information of all concerned

 

(SGD.)

DINA C. MENDEZ

End-user, Office of Public Affairs

 

(SGD.)

ATTY. CARLO FLORENDO C. CASTRO

PLM-BAC Chairperson